Add back Performance Settings to Mackay Settings
releasetools: remove boot.img handling

Depends-on: Ic348d31e8df7933dc4f9f055b7a5a2beacc21d32
http://review.cyanogenmod.org/36813

Change-Id: Ia8dc8219a360c391243dee7a760067277e9e52d1

Conflicts:

	releasetools.py
libcamera: touch-to-focus fixes

- Do not send command to camera unless preview is started
  (fix 4.3 AOSP camera crash)
- Send touch AF command regardless of previous state
  (required to actually trigger touch AF at the new area)

Change-Id: I51a8f80ce1ec38f1052e4660f708be8649478a88