Merge "Add a generic error message for missing vendor error strings." into sc-dev am: 922fe0da54 am: 8d74548cba

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15564960

Change-Id: I5297cb7b6f34f54fe21b506b0c8cafcda05cce2c