Send LowPowerStandby broadcasts also to receivers holding permission

In addition to registered receivers, also send the Low Power Standby
broadcasts to any receiver (manifest or registered) if its package is
holding the permission MANAGE_LOW_POWER_STANDBY.
Privileged apps may have to react to MANAGE_LOW_POWER_STANDBY, and they
should not have to be running at all times to do so.

Bug: 274427730
Test: atest LowPowerStandbyControllerTest
Change-Id: Id7667c0dee4177870f0520055991e9af63a17532