Use insetsRoundedCornerFrame to check if taskbar is expanded or not

When taskbar is expanded, insetsRoundedCornerFrame will be set to true
via LayoutParams. We can adjust animation bounds or crop the taskbar
surface based on the insetsRoundedCornerFrame. In this way, the insets
types in TaskTransitionSpec can be removed.

This is a step to remove ITYPEs.

Bug: 234093736
Test: atest LetterboxUiControllerTest SizeCompatTests
Change-Id: Ibffd5beaf49f3196356b140938c4b2c8cc9d424e