Merge "Allow app usage of AccessibilityInteractionClient#getInstance and clearCache before T" into sc-dev am: 69d87799 am: 1943d7c2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15181867

Change-Id: I81ee6198c23ce30f7b0d84008ee92aa8c9f3cbc9