Merge changes from topics "taskbar3Button", "taskbarIME" into sc-dev am: b2993d65b7 am: a66716d953

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14215248

Change-Id: I9cbca0879e3da071b5f24ef60181fedee8a96d94