Merge "Co-ex: when face fails use error string" into sc-dev am: 62fdd7cf am: 0c2d4def am: f4bbd8e9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15462988

Change-Id: I200135b5d8ed0a13aff94344572d038089299918