Merge "Dump emergency call status." into udc-dev am: 72281b01

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21757690



Change-Id: I64ba587d936f584f57cb357b9153a51123a39dea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>