Make BackAnimationSpec respect DisplayMetrics changes

Bug: 329832380
Flag: ACONFIG com.android.systemui.predictive_back_animate_dialogs TEAMFOOD
Test: atest BackAnimationSpecTest
Test: atest OnBackAnimationCallbackExtensionTest
Test: Manual, i.e. verifying that predictive dialog back animation respects screen bounds after folding/unfolding device
Change-Id: I799f989b8ae4a5f72c00f2f91335aad116c1652b
6 files changed