Refactor Aboutscreen

Change-Id: Ib3f9ccc8b073ea2213984c7594c52d0ae256f602
Fix Performance Menu

Change-Id: I427f953375570a79e64860b75827d113db7cb257
Revamp Halo Settings

Change-Id: Ic441c039542a7f5ddfe1d158b4c0320c52c3ebb8
Include Performance Control in System and add battery level aroung unlock ring

Change-Id: Ie0185231889e9da1604ac030a83ac6765750268a
Disable Halo Settings, if Halo is disabled

Change-Id: I4d6243a7e0a52803e9191437e92d8dcfb1947634
Refactoring

Change-Id: I899819a593520020dc9a639d358a0540f029fe30
Add BuildProp Editor

Change-Id: I9f422e6dc0e38176a54586782922ced998dea519
Move Lockscreen Battery Preference to Custom Menu

Change-Id: I5ce099ffa7db83d41269ec03d680af88af30b582