Merge "Fix untrusted embedding visibility in multi windowing mode" into tm-dev am: 721634a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17696010



Change-Id: If1ef0b1c821b40e05a104782776d446363900adf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>