Migrate Controls{ProviderSelector,Favoriting,Editing}Activities

This moves the activities to the new Predictive Back dispatch mechanism.
Added unit tests for each (note: used a latch to synchronize the test and ui threads)

Bug: 255355028
Test: Passed atest <testname>
Change-Id: I775f636f8679abfd50a595dd56fb8fa3f23e0fef