build: Try to force no-dither via manifest.

As recommended by Mikhail on the forum:
http://www.paulscode.com/forum/index.php?topic=3163.msg16562#msg16562

AndroidManifest.xml

@@ -23,6 +23,7 @@
    <application
        android:name="paulscode.android.mupen64plusae.AppMupen64Plus"
        android:allowBackup="true"
        android:dither="false"
        android:isGame="true"
        android:hardwareAccelerated="true"
        android:icon="@drawable/icon"