tree db9a1c05729c8b9c56b437b41fe86d8b0d59fc91
parent 0039fb35cdfb3e919cdcc604ee648a709a7933bd
author Tsung-Mao Fang <tmfang@google.com> 1664522826 +0800
committer Tsung-Mao Fang <tmfang@google.com> 1664523107 +0800

Guard FallbackHome activity behind permission

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