Apply restore to repositories

This CL also changes the source of truth of the list of tiles:
* Tiles are read once from Settings and kept in memory.
* After tiles change, the new value is applied to memory.
* Changes to the list are posted to a shared flow and applied to the
  current list sequentially.
* If a change occurs in Settings that makes the list different from what
  we have, we overwrite it with our value.

The same thing is done to AutoAddRepository.

The restore is used to trigger a change in the repositories.

It's important to note that the restores are tracked starting at the
point where we check the setting for the value there (on start of the
user). This means that if the restore happens before we get the tiles
for the first time, the setting would have the restored values. This is
probably the best scenario: restore happening before SystemUI starts
interfering.

Given that now we don't listen to Settings, a new shell command has been
added to StatusBarShellCommands to modify the set of tiles.

Fixes: 289502851
Test: atest com.android.systemui.qs.pipeline
Test: atest CtsTileServiceTestCases android.host.systemui
Test: quicksettings PlatformScenarioTests
Test: manual restore using LocalTransport
Change-Id: I287bb3c47c3a4181f29f942bcb18bd81c129273c