Move TabletModeChangedListener to InputManagerGlobal

Move TabletModeChangedListener, along with its associated
functions from InputManager to InputManagerGlobal.
Associated CLs for this refactoring:
- ag/21609952
- ag/21699437

Bug: b/267758905
Test: Pre-submit
Change-Id: Id54ea9df90a622c4675499874e504549117f93ee
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:8233f5d72f5a8ec4d03f0b4fd5b979df5819c87d)
Merged-In: Id54ea9df90a622c4675499874e504549117f93ee