Disable "double tap to check" when "always on"

"Double tap to check" has no effect when AOD is enabled.
Double tapping will take you to the lock screen anyway.

Test: manual
Test: make RunSettingsRoboTests ROBOTEST_FILTER=DoubleTapScreenPreferenceControllerTest
Change-Id: Ia97b7ecb00a9d83b867959d83642d476841e2f13
Fixes: 73096311
3 files changed