Refactor DreamLogger with Logger

This change refactors where DreamLogger is used to take advantage of the
Logger class.

It also adds a FakeLogBuffer class which returns a real LogMessage
object to prevent a NullPointerException when operating on the message.

Bug: 276475093
Test: atest ComplicationCollectionLiveDataTest
Test: atest DreamOverlayAnimationsControllerTest
Test: atest DreamOverlayStateControllerTest
Test: atest DreamOverlayStatusBarViewControllerTest
Change-Id: I68160c4f2c1d46abb0cf67531e749d02f297047d