Merge "Add a new string for widget configuration drop target" into sc-qpr1-dev am: 52c93d17fa am: 70adfb5eb8 am: 26ce2fc8c9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15992145

Change-Id: I8fd80650739c8e534e0d119e879701a0e99a5456