Dream Wake Redirection Introduction.

This changelist provides the ability to redirect wakeup calls from the
dream to the overlay. This is useful in the case where alternative
behavior is desired at wakeup.

Test: atest DreamServiceTest#testRedirect
Flag: aconfig android.service.dreams.Flags.dream_exit_redirect disabled
Bug: 334083490
Change-Id: I7d44b2ca3131f35a9e4c140ca019d233093b484e