Quick affordance interactor uses repository.

Based on a new feature flag, the quick affordance interactor may use the
new quick affordance repository.

Bug: 254853190
Test: added/updated unit tests. Manually verified that, when I hard-code
the left/right selections, I get them to show up on the lock screen.
Clicking on them also works as before.

Change-Id: Ie810d37d1dee97a0dcd23dc3c1ea2141be10750a