frameworks/av: Use QC parser for aac audio only in MPEG4 container

- Default parser causes frequent standby for 'aac audio only' inside
  MPEG4 container - which is also larger than 75 minutes.
  This is due to perfomance issues during read()
- No such performance issue is seen with QC parser

Change-Id: I28eb5ecfeeaa1103cc149f346e20c5c232967bed
CRs-Fixed: 760668