Frameworks: PIE optimize

- stop listening on TelephonyManager if pie is disabled
- reuse already constructed SnapPoints
- pass trough mPieTriggerMask and mPieTriggerSlots
- a bit code cleanup

cheers

Change-Id: Ieef66e8cd7abe89cd419f2f368ef06f09d4e40b4

Conflicts:
	core/java/android/provider/Settings.java