audio: Handle sonification for last stream in stopOutput

-Low visibility stream is not muted during voice call when
played back to back.
-In startOutput, handleInCallSonification is called only for
first time i.e. mRefCount is 1. While in stopOutput, it is
called without any check on refCount.
So the second notification stream gets played when stopOutput
of first stream unmutes the muted stream.
-Handle sonification while in call only for last stream in
stopOutput i.e. mRefCount is 0.

CRs-Fixed: 645543
Change-Id: I73727c3cc39e7ceecfbc961c3accb109cd013d96
Audio: Fix HDMI audio device switch issue

- Device routing is not triggered in the following scenario:
  Start playback on HDMI, pause it, unplug and plug the HDMI cable,
  resume playback, music starts on speaker.
- Fix by update outputDesc->mDevice even if the requested device is 0

Change-Id: I4d1c1f76094f4acb20acdb8af68302ea8a1008c5
CRs-Fixed: 606004
 Audio: Fix for audio loss on switching between speaker and USB headset

 - snd device reference count is not decremented when usb headset is
   unplugged, because touch tone is still active on usb headset.
   So when usb is plugged again device routing is not triggered as
   present and prev devices are same
 - Fix is to route audio to speaker as soon as usb headset is
   disconnected

   CRs-Fixed: 630425

Change-Id: Id07bc44a39f72f33b39fd180efd1859de63650e5
wlan: Fix for improper comparison of driver_status string

This commit ensures driver load failure status is compared with
valid string which has the failure/success information.

Change-Id: I3b619ad0c005fb793d127bd2a23b376ed961d0b7
CRs-Fixed: 652539
Revert "audio: Handle sonification for last stream in stopOutput"

 * Weird voodoo here. Will revisit.

This reverts commit faa89e38febf7a542ff3d414fc8bc7827f43de57.
audio: improve logging.

- log msgs showing device switches
- log msgs shoing open/close of input/output streams

Change-Id: Ic6fbedc4b48db72bf2cf8af38ade0e3e80243640
audio: Increased mute wait for USB Playback

- Sometimes, when touch tones are played over USB Headset
  glitch is heard. This issue is seen when startOuput
  is called for touch tone after the device goes into
  standby

- Fix is to increase the mute wait during starting of the
  output to give additional time for the proxy device to
  come up

CRs-Fixed: 615405

Change-Id: I37b772582058ec6939ca13067a31360a4de9784b
Audio: Add new format and property for PCM offload

- Add string to enum method for PCM offload 16/24 bit
  formats

Change-Id: I8dcc2e35e1c8635a5b8f6f8de15167a40b842767
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_hardware_libhardware_legacy into cm-11.0