Turn off RTT if a carrier doesn't support it am: b209db8d am: c957b072 am: 8273b22a am: 1235981a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/net/ims/+/12120134

Change-Id: I900e51968c7c7d14ac29e7a1f9609e77f6b6cbc8