Use bounds to proxy if an app is full screen.

Use bounds to proxy if an app is full screen. Using the windowing mode
is not accurate when going to and from pip. There doesn't seem to be a
simple solution on the pip side. This is a proxy until we figure out a
long term solution.

Bug: 239389499
Test: atest CtsWindowManagerJetpackTestCases:ExtensionWindowLayoutComponentTest
Change-Id: Ic7bfba41a2ec493856bd82aa3726eb956055e40d