media_codecs: enable ffmpeg codecs

Change-Id: Iffccdb664848071073aa5ba01ecc29c1715c481a
media_codecs: use ffmpeg for wma for now

Qcom hardware decoder seems to have gotten broken.
Fall back to ffmpeg software decoder for now.

Change-Id: I7acf9b53cc769fecf6554e33e42d824ad2dbad4e
media_codecs: remove few ffmpeg entries

Change-Id: I41ff3195e0f6c10f6e27c1e2786e15a734bcefac
use caf audio variant

Who cares what it's called. This just means less patching outside
device tree. This is misleading because it would indicate we're
building something from hardware/qcom/audio-caf which isn't the
case. Audio HAL in device tree of course has always been CAF based.

Change-Id: I13f19ed3e34ef5e6c4ee5176bb2fc806b3f0cd29
cortex-a5 has VFPv4

Change-Id: I79c6257dd3a5276e911e41f10485ad5482413359
audio_policy: fix VoIP

Change-Id: I27a402c36447c5ece27b03564df7dd9eb89c5926