hammerhead: Update audio config

Update sampling rates, offload MPEG2 audio, enable aac encoder,
load libldnhncr, remove duplicate stuff.

Change-Id: I44bc5dba624a1a78fd310ad8d4605d22750e0705
hammerhead: Add qcom perf library

Also, remove deprecated flag.

Change-Id: I045f36f72c66ace155c5cb40c7345ef0d8271e29