Add flag for bug where bubble was expanding on auto rotate.

Add a flag to guard the bug fix where a bubble was expanding if the
rotate button was clicked.

Flag: com.android.wm.shell.bug_rotation_button_cover_bubble
Bug: 424165276
Test: manual - move bubble under rotate button and click.
Change-Id: I09825cbf07f192f4bc0cb2a1fc7775f4476c3aed