Merge "Use mWindowContext instead of re-creating to avoid stale Resource" into sc-dev am: 5160385a0b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14455656

Change-Id: I448c48cae24b9ae7341deeebf2f70e3b33040ca4