Settings: give boot_completed receiver higher priority

We need it to start up as quickly as possible.

Change-Id: Iaa99b6519c46b3bd0b85adcd59bbfb76b4983b64
Signed-off-by: Roman Birg <roman@cyngn.com>
(cherry picked from commit 5c84049c850b90d8d2db57bdc9afdf3239ee6c5e)