Prune catalog app unused resources

Author: simoarpe

samples/Catalog/android/app/src/main/AndroidManifest.xml

@@ -14,8 +14,7 @@
         android:name=".MainApplication"
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
-        android:label="@string/app_name"
-        android:theme="@style/PSPDFCatalog.Theme.Light">
+        android:label="@string/app_name">
         <activity
             android:name=".MainActivity"
             android:configChanges="keyboard|keyboardHidden|orientation|screenSize"