Delete ShadeTransitionController

ShadeTransitionController and ScrimShadeTransitionController don't seem
to do anything but listen to ShadeExpansionStateManager and pass some
of its data to ScrimController, so this change deletes one of them and
corrects how the other is initialized.

Flag: N/A
Test: Updated and ran affected tests
Test: Manual
Bug: 303267342
Change-Id: I5bba929869dfe025bdc2f44c0f2cc5956cdd7c0b
11 files changed