Add warning message when camera privacy lock is enabled for screen attention settings

Test: locally with flame, make RunSettingsRoboTests -j$(nproc)
ROBOTEST_FILTER=AdaptiveSleepCameraStatePreferenceControllerTest,
AdaptiveSleepPreferenceControllerTest

Bug: 177462182
Change-Id: I9880d6b82e9a5040534aceda4ff15275e0bcf72a
6 files changed