manifest: add extractNativeLib attribute

Prevent the system from creating a second copy of the .so files and fix
the System.loadLibrary call so it’s able to find and open native libs
straight from the APK. This is used starting from Android 6.0.

Change-Id: If2d35d13ff71a6c2305dd6086455bf65c88a44aa

ring-android/app/src/main/AndroidManifest.xml

@@ -68,6 +68,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
         android:name=".application.RingApplication"
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
+        android:extractNativeLibs="false"
         android:label="@string/app_name"
         android:resizeableActivity="true"
         android:supportsRtl="true">