Merge "Fix "null" toast when FillCallback.onFailure(null) called." into rvc-qpr-dev am: 906ec8897e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12279991

Change-Id: I63f90c2cd18af251b645e5484c29a07dbb81ee94