Limit app handle from bubbles to fullscreen apps

When we enable app handle due to bubble anything feature, keep it for
fullscreen apps only.

Bug: 404919014
Test: check that only fullscreen apps show the handle
Flag: com.android.wm.shell.enable_bubble_to_fullscreen
Change-Id: I75817a7f683ff5a343afacad7f4d1a6418c439a6