[conflict] [DO NOT MERGE] Update window with FLAG_SECURE when bouncer is showing am: c561831a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19952040



Change-Id: Ie7874f87fa568f76047a9e08dae3d406b7b565f0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>