Migrate tiling listening to display config changes from ShellController

ShellController only informed tiling of display config changes on the
primary internal display, while tiling cared about all displays.

This CL migrates tiling from using the ShellController API to using the
DisplayController API which notifies tiling of display changes on all
displays.

Flag: com.android.window.flags.enable_tile_resizing
Test: Unit tests and on device testing
Bug: 438621051
Change-Id: Iaac942abe45b0c3cb740969a70c6d1c48bbcf620