Expose some level of logging to aid debugging. am: bc86158b am: 9ae30b40 am: 45b1415c am: 15f3cfad

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11818182

Change-Id: I70f3392aa54d90fbcbacbb873d85c46a3a5d35db