Merge "Statsd notif logs: important conversations." into rvc-dev am: 263c7f9b am: c10dd8bb am: 1fdc92be

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11931359

Change-Id: I7ae7cf891fe6fa7a5be0b3a7fbb3bf7d1dd43c9a