Merge "Don't allow pinned window to be IME target" into rvc-dev am: 218e017d93 am: 11f5d41c2d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11875421

Change-Id: I51fdf322bf66aea859bf8b5364cec77bdaa1d176