Update AndroidManifest.xml

- Reverted "installLocation" to "internalOnly". Because Epoch Launcher can be set as the default launcher, it shouldn't go AWOL when the external storage is removed.
- Removed the "android:hardwareAccelerated" option. It is automatically set to "true".
- Added "screenLayout" option to "android:configChanges" for those odd devices it may apply to.
- Added parameters for .FakeLauncher so that in case it ever runs (this shouldn't happen normally) it can start .MainActivity and re-disable itself (sort of a clean-up function).