Merge "Add error log for when widget provider is null" into tm-qpr-dev am: 8ccd22f4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19221970



Change-Id: I60aa962332ede90d8d6fa125fb7924ae3c820190
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>