Remove rotation and app bounds from Configuration diff.

The presence of these new flags leads to issues with application that
do not expect their presence. Since these flags can appear at
critical times, such as on orientation change, these issues are
brought to the surface often.

This CL remedies this problem by first removing the rotation
property. It is not used and the original issue of orientation and
Configuration alignment has been addressed. For app bounds, the CL
reverts the behavior back to identifying diffs as a screen size
change.

Fixes: 64004417
Test: bit FrameworksServicesTests:com.android.server.wm.AppBoundsTests
Test: go/wm-smoke

Change-Id: I1fabb564dfb5c13d897336708523cf7cd5099fa0