[automerger skipped] Merge "Revert "Use TelephonyManager#isEmergencyNumber() instead"" am: 99557526 am: f50a479c am: 3dc09e76 -s ours

am skip reason: Merged-In I5df03a61f55f863e17594aa3239433a5048a4890 with SHA-1 839508ee is already in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1702033

Change-Id: I1ec154cfd52ced4e14236081ae245045723f89fc