SettingsProvider: add default overlay entry for SEND_ACTION_APP_ERROR

Add a default entry for Settings.Global.SEND_ACTION_APP_ERROR so that it
can be overlayed elsewhere if needed.

Change-Id: Ieffc2f4a1ad8ad0df04a9e33b575150a680478af
Signed-off-by: Roman Birg <roman@cyngn.com>