Use AIDL callbacks directly.

Bug: 210498497
Test: build cuttlefish with ag/16322062, watch logs
Change-Id: I1e0cd95f5f9a911564d14be2d8bbb328572de8c8
Merged-In: I1e0cd95f5f9a911564d14be2d8bbb328572de8c8
40 files changed