Make lock screen menu button actions work regardless of rebinding

Fixes 'Menu unlock' and (Lock screen->Button actions->)'Long press Menu button'
when the menu button is assigned to an action other than its default.

Change-Id: I4c2e2cf47fa2f0c171e3599cdc36bc744a708c3b
Merge "Make lock screen menu button actions work regardless of rebinding" into cm-10.2