DisplayCutout: Cache rotations of DisplayCutout

Caches the result of the DisplayCutout computation for all rotations.
With the fix to 72444324, the rotated DisplayCutout is recomputed a
lot more frequently for all rotations.

Bug: 72444324
Test: atest RotationCacheTest
Change-Id: Id413cf35fc2a6e77f738f0e3b42971e0387fd7bb
4 files changed