Move two audio APIs back the the greylist.

These APIs are used by older versions of the unity game engine, and many
of these games are not in a position where they are able to update
unity. To keep these games working now and in the future, leave these
APIs on the derestricted greylist.

Bug: 134049522
Test: m
Change-Id: I541ed6fbacfc1e405a319af5c2ff785625afb26a