Add support for tiling session persistence.

This CL initializes tiled apps as soon as the decoration is created upon
entering desktop mode after device restart.

Flag: com.android.window.flags.enable_tile_resizing

Flag: com.android.window.flags.enable_desktop_windowing_persistence

Test: unit tests and on device testing

Bug: 400973989
Change-Id: I66967998ee5bc356196128d8b13be033d1d8150a