goldfish: add radio access family

To LTE as default

only impact emulator

BUG: 134408724
Test:
CtsTelephonyTestCases android.telephony.cts.TelephonyManagerTest#testGetRadioAccessFamily

Change-Id: I9b4cdef60eaf58bbfe318aa3a462fba30bbac9a4
Merged-In: I9b4cdef60eaf58bbfe318aa3a462fba30bbac9a4

(cherry picked from commit eb1a1f0f670d1cba69609ad399b66639a81cb15f)
(cherry picked from commit db5ea081a90b6faf3e7b04478903199c1a50dc98)