Revert "Revert "Removing AM.getTasks call on UI thread during touch down"" am: 7ee087f53f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17802989

Change-Id: Ia4bb67a6c3eb60a92466bfc94efaafd39fa37cb3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>