Add tests to known failures that were affected by recent UI changes.

Changes to overscroll UI (making the edge effect less intrusive and more
translucent) affected CTS tests which used hard-coded golden images to
verify the old behavior. Disabling this tests for now, pending
a less fragile version of them that tests the general behavior without
being so specific about how that behavior must look on the screen.

Bug: 63010438  Tweaks to overscroll animation
Test: manual
Change-Id: I85f996d73155a042a1976cb487c5100863b5208c
1 file changed