GesturesSettingPreferenceController to Toggle

Convert GesturesSettingPreferenceController to
TogglePreferenceController,
All of its children need follow the change,
add setter and robotest for them:
AssistGestureSettingsPreferenceController
DoubleTapPowerPreferenceController
DoubleTapScreenPreferenceController
DoubleTwistPreferenceController
PickupGesturePreferenceController
SwipeToNotificationPreferenceController

Change-Id: I792b2d370eea828bf345fb2b1cc3eac260eb66f4
Merged-In: I792b2d370eea828bf345fb2b1cc3eac260eb66f4
Fixes: 74913806
Fixes: 67998110
Fixes: 67998098
Fixes: 67998048
Fixes: 67998069
Fixes: 67997452
Test: make RunSettingsRoboTests