Added api to support generic authentication architecture.

Bug: 154865133
Test: atest cts/tests/tests/telephony/current/src/android/telephony/gba/cts/
Test: manual by GbaTestApp
Merged-In: I9aea4c8bc2123b6d00c4a8ddf9901c885d2742d2
Change-Id: I9aea4c8bc2123b6d00c4a8ddf9901c885d2742d2