Add a QSSettingsRestoredRepository

This is the first step to improving the B&R story in the new pipeline.

This is not flagged as it's not actually connected to anything.

Test: manual, send broadcast through adb
Test: atest QSSettingsRestoredBroadcastRepositoryTest
Bug: 289502851
Change-Id: I78ea4fb750ec6b403d7abd801174835a094acec1