LockScreen: allow hardware key longpress to put device to sleep

Change-Id: I251e72cda94f88de3715d818ba62e796e3b2ccd0
lockscreen battery status: add off option (1/2)

Change-Id: I06dd1b81826bdb1c1e35b72d99970f97dcad1a34
Merge remote-tracking branch 'cm/cm-10.2' into cm-10.2