Merge "Make ImePerfTest wait for animation end" into sc-dev am: 28a77d58 am: 29cd6f01 am: 3af53aa2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15161272

Change-Id: I00ba4b20f28550d1519c66c927618ead07844b87