Merge "Add windowing_frontend flags to window flags" into main am: 5effed6cda

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2750643

Change-Id: I8bd2ba519580c805c7673117f73397b30930bcdf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>