Merge "Invoke IME switcher for taskbar through SysUI" into sc-v2-dev am: 04d52b48ac am: 410dc840dc

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/16149981

Change-Id: I58fec441fcf24f29415cf8f283dbf6956b6792a4