Remove allow custom buttons checkbox (2/2)

they are now rebound by default

Change-Id: I69febb8156560951bf305a6f699b726d5d75c195
LockScreen: allow long-press actions from hardware keys (2/2)

Credits: CM

- Alphabetized lockscreen fragments
TODO: remove this fragment if device doesn't have hardware keys.

Change-Id: I251e72cda94f88de3715d818ba62e796e3b2ccd0