Merge "Ignore touches in taskbar and all apps windows during system drag." into tm-dev am: 6ad7a477 am: 90d8b0c5

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/17008771

Change-Id: Iddab3787df507cc19b0556fc3243cc66459d9f7f