Merge "Use TelephonyManager#isEmergencyNumber() instead" am: da2033d965 am: 9a7681864d am: c00c8317ca

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1453862

Change-Id: Ifd52c7781161c70437d713d296b0bb63ae2750b6