The reference to telephony registry service was assigned prior telephony registry service was ready. Fixed by casting the binder every time when we use it. Test: Manual Bug: 65593241 Merged-In: Ib234cdfd93130f7af44ef79271b106fffb8ebad5 Change-Id: Ib234cdfd93130f7af44ef79271b106fffb8ebad5 (cherry picked from commit 66420e258a97e864985530ae7a1e208c978dbc7a)