Add CTS test for new roaming state APIs in NetworkRegistrationInfo

Bug: 260017781
Test: atest CtsTelephonyTestCases:NetworkRegistrationInfoTest
Merged-In: Ia129df165ab0fd8da4a1978ea42f519e0f886161
Change-Id: Ia129df165ab0fd8da4a1978ea42f519e0f886161
2 files changed