Merge "Fix UI issues of fake task view in gesture nav tutorial." into udc-dev am: 24aec5e6b0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23120959

Change-Id: Ia900cae2b1da86ccfb829a90d287eb383ed72713
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>