libaudiohal@aidl: Process telephony parameters

Add processing and conversion into AIDL for
AUDIO_PARAMETER_KEY_TTY_MODE and AUDIO_PARAMETER_KEY_HAC.

Bug: 291411017
Test: m
(cherry picked from https://android-review.googlesource.com/q/commit:b9a81314fdbd258f256dd1f1d2443c434aa40ecd)
Merged-In: I097fab057f0ba4eacb5c0455f8158492797391bc
Change-Id: I097fab057f0ba4eacb5c0455f8158492797391bc