Merge "Make WindowList.addFirst() public" into main am: e276b58346 am: f315e92cef

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2932071

Change-Id: I01c4561385a0a1fcefee3a391178bd4b80563c0d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>