8b8d3b45f9
An attacker can launch FallbackHome of the Settings app
to reset unlock time. This would prevent the device from
sleeping because it runs the following code:
PowerManager#userActivity().
However, running PowerManager.userActivity() requires
android.permission.DEVICE_POWER or android.permission.USER_ACTIVITY.
So, let's add a permission to guard this activity.
Test: Rebuilt a rom and see no side effect.
Bug: 246543238
Change-Id: I23a1e352f76cbec3e8c07a1b58b94615f2779121
(cherry picked from commit f5062c2df8)