Add the Moves setting values to the backup list.

Add Secure.CAMERA_DOUBLE_TWIST_TO_FLIP_ENABLED,
Secure.CAMERA_DOUBLE_TAP_POWER_GESTURE_DISABLED, and
Secure.SYSTEM_NAVIGATION_KEYS_ENABLED (used by Settings->Moves)
to Secure.SETTINGS_TO_BACKUP, so that they will be backed up and
restored automatically.

Fixes: 31023788

Test: Manual - Setup device using "Copy your data", verify that
Settings->Moves toggles are set to previous selected values.

Change-Id: I509c997641bb693009bec703e5272b5aad517f0f