Merge "Show a toast message for apps not supporting multiple instances split" into tm-qpr-dev am: 26fb39d2ba am: 18e4f3a6ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20481325

Change-Id: I6eae80ca0275d2784869b80a35caa669f5a1097f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>