telephony: Add backwards compatibility with pre-oreo blobs (2/2)

13bac7bc86cbfca9d9508ae3e4c3facfd514bbe3 changed id and idx to index
however, pre-oreo blobs still call the id and idx functions. Add the
old function names and just point to the new functions.

Change-Id: I88a241025a281712c3fbfdff153b4476a6fb1c5f
1 file changed