audio: Use legacy CAF buffersize logic

Change-Id: I028497485d7c9e432a7192f71630e095ed3ccec3
cm.mk: Change build fingerprint to stock find5 fingerprint

Bogus fingerprints do weird shit.

Change-Id: Ib4309c9196e0a99d8c6f5814bbb9de0df7a2f3de