hal: Squashed set of updates and fixes from 8974 branch

hal: Compilation fixes

 * Properly include path to kernel headers for postproc effects
 * Don't try to build SSR or Listen if QC_PROP_ROOT isn't set

Change-Id: I8f2a874bbbec09cea8eae423a82e6cc59d03f422

hal: Allow enablement of COMPRESS_VOIP without multisession voice

 * It works!

Change-Id: Ie150055bd711a0060db91e50a47b7726f42cdc4e

hal: Add support for dedicated VoIP devices

 * Some devices out there have dedicated paths for VoIP, add support
   for these by setting the system property.

Change-Id: I59cd97e78427f811559081a04151c9a2eccf452f

hal: Fix digital USB headset combo device

 * Digital USB output was not handled in this case. Add it.

Change-Id: I8e984a2cf545dabdc6dc538b75e8ca7221fb6688

hal: Fix voice call recording for msm8974

Voice call recording uses audio-record usecase which causes recording
only devices microphone. Use the correct usecase for call recording.

Change-Id: Iaa9fc30534263c6de9b4b66fa5ffa9a1e2cc8fd4

hal: Rename & move platform_parser.c

Move platform_parser to root hal directory. Rename
platform_parser to platform_info. Change name of
XML file read from platform_info.xml to
audio_platform_info.xml. The xml now only needs
information for ACDB ID's that you want overwritten.
Names in the XML now match sound device enums in
platform.c.

Change-Id: I6f9bfcf4149f08d88cb2a95ba021bdf7296aaf4d

audio: extend platform parser

Extend platform parser with support for additional sections.
Supported sections now include acdb ids, pcm device ids and backend names.

Change-Id: Idfbc8a8bb490606686436c107db5b0c7d636ccbe

audio: Extend platform parser to allow device name aliasing

* Supported sections now include device names
* This allows for aliasing device names to a custom name

Change-Id: I880e90a7e887f020517d89ba276199c700c0eeae

hal: add support for low-latency capture

- add support for low-latency capture

Change-Id: Ic8a82854799adfa4eb1fcd323e0177eeadc7e319

hal: Clean up compilation warnings

Change-Id: I3857f565dd7a2f3ce3a1cbb783eb3d67fb024e3e

hal: Invert standard build flags

 * Always include these unless explicitly negated

Change-Id: I3931ef089dddcd9ac9f61d8b7e870cf916a4e47d

hal: Kill useless logspam

Change-Id: I540e3e22670c192d440697c0ae284225427711e0

platform-info: Fix error messages

Change-Id: I543d5c99e5c07e6acc43811608a1f5917d7d595f

audio-caf-msm8974: Fix log message

Change-Id: If1e161b55b587076f3baeb763792f1d29aca361b

audio-caf: msm8974: Correctly handle the lack of voice_extn

When building without

AUDIO_FEATURE_ENABLED_MULTI_VOICE_SESSIONS:=true

the voice_extn functions return -ENOSYS when called.  Treat that
return code from the set_parameter functions as success rather
than failing the entire set_parameter sequence.

Prior to this change, adev_set_parameters does nothing when the
voice extensions are not compiled into the code because it
immediately calls voice_set_parameters which then itself immediately
fails due to -ENOSYS being returned from voice_extn_set_parameters.

Change-Id: I5b74f8a94325c26d9f24ba7bd85f5b21b5f1cbdf

hal: Make use of hwdep calibration optional

 * Not all devices can use this, as it requires a very new ACDB
   loader and kernel-space support. Disable it by default until
   devices catch up.

Change-Id: I16eaabbfc678c90f125469d047f5b8d3addcd57d