Merge "Force initialize task stack callback for gesture modes on init" into sc-dev am: e1a5d6bb1b am: 90e18156b5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/14754620

Change-Id: I2000250199c9a4a23ee527b52c21639665b243a2