libstagefright: Wrapper for FLAC CSIM decoder

A new FLAC decoder is being used to decode 24 bit clips with
very high sample rate (192kHz) and this code is a wrapper to that decoder.
The decoder will be used only if the extended extractor is invoked.

CRs-Fixed: 609395
Change-Id: I59a33e0e00fd2fc6e88318d0e597519579aa56e9

libstagefright: Optimize the wrapper for FLAC CSIM decoder

Move dlsym calls to constructor and do all memory allocations
only once to avoid fragmentation of heap.

Also add support to handle multichannel PCM from the decoder.

Change-Id: I7feace450d692528eb00c39df4bffff2c5528ada

libstagefright: Modify the path of FLAC headers

The location of the headers of the FLAC CSIM library has changed.
Modify the include path to reflect the right location.

Change-Id: I13630a089716d8c1b35bfc5451d83ba3f3ade6a7

libstagefright: Add support for FLAC superset clips

Memory requirements for FLAC superset content are high as each
channel can contain upto 64k bytes. Redefine the macros to meet
these requirements.

Also initialize the decoder to give data in configurable bitWidth.
Currently, only 16 bit output is supported though.

Change-Id: I60b7b329bb3c0653f7a7c0fbe55229aaf5d62918

libstagefright: Enable ACodec path for QTI FLAC solution

Use the OMX component of Google's RAW decoder for FLAC codec and
setup NuMediaExtractor to extract PCM samples from FLACDecoder.

CRs-Fixed: 643618
Change-Id: Iaa7594e4d882b52157f49e7c9b2da1861ba49568

libstagefright: Improve logging for QTI FLAC Decoder

Edit logs to print relevant messages when QTI FLAC Decoder is used
to decode FLAC content.

CRs-Fixed: 648845
Change-Id: I1fb5c4f5757dc54c37ac255fda83cb1f96f8504d

libstagefright: Add FLAC format in compress offload path

- Add mime type mapping for FLAC
- Add flac codec specific params in offload metadata
- Set bit width based on kKeySampleBits

Change-Id: I8781edd352346355d6f9a4274d29b85d6f2e4b55

audio: remove key definitions for FLAC meta data

- Remove FLAC meta data specific keys in metaData.h
- Define the same keys in QCMetaData.h

Change-Id: I7249c223d321d59923e970898ae2f4d112ed8ea5

audio: update QTI resampler feature flag

- update QTI resampler feature flag to
  AUDIO_FEATURE_ENABLED_EXTN_RESAMPLER

Change-Id: I79d8323911464dc6777d26b11b4c500782d7a548

audio: update QTI FLAC decoder feature flag

- update QTI FLAC decoder feature flag to
  AUDIO_FEATURE_ENABLED_EXTN_FLAC_DECODER

Change-Id: Id4737f4bc31eb2b8f3c9dc36ca2bdac91e327adc