Merge "Ignoring WidgetsListHeader in WidgetsTwoPaneSheet" into udc-qpr-dev am: ff23ce8265 am: db88f85801

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/24540213

Change-Id: If2f05b7520fc23c9272702d2b58157d8d90b7f73
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>