Lint issue with API23 fixed

Author: smarek

library/src/main/AndroidManifest.xml

@@ -4,6 +4,4 @@
 
     <uses-permission android:name="android.permission.INTERNET"/>
 
-    <application/>
-
 </manifest> 

sample/src/main/AndroidManifest.xml

@@ -10,6 +10,7 @@
     <application
         android:name=".SampleApplication"
         android:allowBackup="true"
+        android:fullBackupContent="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme">