Merge "Show warning toast for secure window" into tm-qpr-dev am: 073eeabf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19561238



Change-Id: I575c65a3918c1a89c86af1391e51c4a559968746
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>