Revert "DeviceKeyHandler : Allow handling keyevents while screen off"

This reverts commit 66a6223b120e140eaa4d09bb9a8e387bfef20cf1.
Revert "Detect whether overflow button should be shown based on menu key state"

This reverts commit f2e67461a1c0c264195589305f1142f25f3277ae.

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java