Estou com problemas para enviar meu aplicativo para a loja do Google Play, pois sempre que faço upload do APK recebo a mensagem "Dispositivos suportados pelo Android: 0"

Eu realmente não tenho idéia de como consertar isso. Quando removo todas as referências ao signalR e removo os arquivos jar, recebo 8k dispositivos suportados.

Aqui estão algumas informações sobre o meu projeto

EDIT Aqui está manifesto

<?xml version="1.0" encoding="utf-8"?>

<uses-sdk
    android:minSdkVersion="15"
    android:targetSdkVersion="21" />

<!--
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<android:uses-permission android:name="android.permission.READ_PHONE_STATE" />

<android:uses-permission
    android:name="android.permission.READ_EXTERNAL_STORAGE"
    android:maxSdkVersion="18" />
!-->
<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/StudyTreeTheme" >
    <activity android:name="com.braintreepayments.api.threedsecure.ThreeDSecureWebViewActivity" />

    <service
        android:name="com.paypal.android.sdk.payments.PayPalService"
        android:exported="false" />

    <!-- Required to use Drop-In -->
    <activity android:name="com.braintreepayments.api.dropin.BraintreePaymentActivity" />

    <!-- Required to use PayPal -->
    <activity android:name="com.paypal.android.sdk.payments.PayPalProfileSharingActivity" />
    <activity android:name="com.paypal.android.sdk.payments.ProfileSharingConsentActivity" />
    <activity android:name="com.paypal.android.sdk.payments.FuturePaymentInfoActivity" />
    <activity android:name="com.paypal.android.sdk.payments.LoginActivity" />
    <activity
        android:name="com.paypal.android.sdk.payments.PayPalTouchActivity"
        android:theme="@android:style/Theme.Translucent.NoTitleBar" />
    <activity
        android:name=".Activities.MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Activities.SignUpActivity"
        android:label="@string/title_activity_sign_up" >
    </activity>
    <activity
        android:name=".Activities.ProfileActivity"
        android:label="@string/title_activity_profile" >
    </activity>
    <activity
        android:name=".Activities.BaseActivity"
        android:label="@string/title_activity_base" >
    </activity>
    <activity
        android:name=".Activities.CourseListActivity"
        android:label="@string/title_activity_course_list" >
    </activity>
    <activity
        android:name=".Activities.TutorLocalSessionActivity"
        android:label="@string/title_activity_tutor_profile"
        android:uiOptions="splitActionBarWhenNarrow" >
        <meta-data
            android:name="android.support.UI_OPTIONS"
            android:value="splitActionBarWhenNarrow" />
    </activity>
    <activity
        android:name=".Activities.StudentProfileActivity"
        android:label="@string/title_activity_student_profile"
        android:uiOptions="splitActionBarWhenNarrow" >
        <meta-data
            android:name="android.support.UI_OPTIONS"
            android:value="splitActionBarWhenNarrow" />
    </activity>
    <activity
        android:name=".Activities.StudySessionInformationActivity"
        android:label="@string/title_activity_study_session" >
    </activity>
    <activity
        android:name=".Activities.dummy.DetailTutorStudySession"
        android:label="@string/title_activity_detail_tutor_study_session" >
    </activity>
    <activity
        android:name=".Activities.DetailTutorStudySessionActivity"
        android:label="@string/title_activity_detail_tutor_study_session" >
    </activity>
    <activity
        android:name=".Activities.CreateStudySessionActivity"
        android:label="@string/title_create_study_session" >
    </activity>
    <activity
        android:name=".Activities.TutorStudySessionActivity"
        android:label="@string/title_activity_tutor_study_session"
        android:uiOptions="splitActionBarWhenNarrow" >
    </activity>
    <activity
        android:name=".Activities.SessionTimerActivity"
        android:label="@string/title_activity_session_timer" >
    </activity>
    <activity
        android:name=".Activities.SettingsActivity"
        android:label="@string/title_activity_settings" >
    </activity>
    <activity
        android:name=".findTutorActivity"
        android:label="@string/title_activity_find_tutor" >
    </activity>
    <activity
        android:name=".Activities.FindTutorActivity"
        android:label="@string/title_activity_find_tutor" >
    </activity>
    <activity
        android:name=".FindTutorsActivity"
        android:label="@string/title_activity_find_tutors" >
    </activity>
    <activity
        android:name=".Activities.StudentRatingActivity"
        android:label="@string/title_activity_student_rating" >
    </activity>
    <activity
        android:name=".Activities.StudentCreditCardActivity"
        android:label="@string/title_activity_student_credit_card"
        android:uiOptions="splitActionBarWhenNarrow" >
    </activity>
    <activity
        android:name=".Activities.TutorPersonalInformationActivity"
        android:label="@string/title_activity_tutor_personal_information" >
        <meta-data
            android:name="android.support.UI_OPTIONS"
            android:value="splitActionBarWhenNarrow" />
    </activity>
    <activity
        android:name=".Activities.StudentCreditCardDisplayActivity"
        android:label="@string/title_activity_student_credit_card_display" >
    </activity>
    <activity
        android:name=".Activities.ChatActivityPackage.ChatRoomActivity"
        android:label="@string/title_activity_chat_room" >
    </activity>
    <activity
        android:name=".Activities.ChatActivityPackage.StudentToTutorChatActivity"
        android:label="@string/title_activity_student_to_tutor_chat" >
    </activity>
    <activity
        android:name=".Activities.TutorProfileActivity"
        android:label="@string/title_activity_tutor_profile" >
    </activity>
    <activity
        android:name=".Activities.TutorFeeActivity"
        android:label="@string/title_activity_tutor_fee" >
     </activity>
     <activity
         android:name=".Activities.ChatActivityPackage.TutorToStudentChatActivity"
        android:label="@string/title_activity_tutor_to_student_chat" >
    </activity>
    <activity
        android:name=".Activities.TutorAddRemoveCourseActivity"
        android:label="@string/title_activity_tutor_add_remove_course" >
    </activity>
    <activity
        android:name=".Activities.ShareWalling"
        android:label="@string/title_activity_share_walling" >
    </activity>
 </application>
 </manifest>