Unhide API setAllowedNetworkTypesForReason and getSupportedRadioAccessFamily

Make Carrier APIs public for not-preinstalled carrier app to determine whether UE is 5G-capable and set 5G capability

Test: atest cts/tests/tests/telephony/current/src/android/telephony/cts/TelephonyManagerTest.java
Bug: 213937426

Change-Id: I758cad74296e59618122853f479ad4f0c261d726
Merged-In: I758cad74296e59618122853f479ad4f0c261d726