Merge "Implement DisconnectingState" am: 2cfb250d6d am: d3b37546db am: ef9733a9c9

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1547274

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2f39b3e3910f64011eb65147a9c37986f7c2bb63