Merge "Wait starting window finished in syncInputTransactions" into sc-v2-dev am: 477b8b4e am: 922ddf82

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15683888

Change-Id: I1e4c52c5e603629c190178ee4b4e8787241473a6