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

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

Change-Id: Ic210c98f039010f4a963bac84eb98f6ffb1fa1e0