stagefright: Set bit_width if ENABLE_AV_ENHANCEMENTS is defined

the compiler failed with error "has no member named bit_width" because bit_width is set only ifdef ENABLE_AV_ENHANCEMENTS

https://github.com/CyanogenMod/android_frameworks_av/blob/cm-11.0/media/libstagefright/AudioPlayer.cpp#L228

Change-Id: I931879f09164482fc09e53a4135d88537b05c7ff
libstagefright: refactor Legacy LPA makefile

  - add in msm7x27a
  - remove unused USE_LPA_MODE flag

Change-Id: I9e8d9376e1cfbd37e6457c0fd8e6252848f6b24d
libstagefright: Enable meta mode for 7x27a video encoder

msm7627a family of chipsets supports only one input frame at
one time. camera expects the input frame to be released before
sending another frame. so send one input buffer and available
output bufefrs to video encoder component. Release the input
buffer to camera (to get another frame) after receiving input
frame done callback from video encoder component.

Change-Id: I4b4512d33c8c78f1c87d5b65a81e1d0cd0138ad3
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>
libstagefright: Add support for custom LPA buffer size in legacy LPAPlayer

     - on msm7x27a with bootloader heap for lpa audio during audio playback with,
       DSP Manager effects enabled there is a lot of stuttering with the default buffer size.
       with bl heap we need buffer size of 480, but that breaks audio at in cm. So we have,
       to use buffer size of 512 to get audio working but it makes stuttering as mentioned.
       so add support for a custom buffer size so we can use 480 buffer size.

Change-Id: I8df1f884d747a501ee00f7a929f2aed4c85983c5
Revert "audio:Avoid AudioTrackThread if Track creation fails"

This reverts commit b96f07930159ebbdcd44645ac62604ff6cbddfc7.

Change-Id: Iae20ed1c59a206450b3de18118b1b9c4a8a469c5
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>
audioflinger: only exchange AUDIO_SOURCE_HOTWORD when using pre-kitkat audio-policy

Change-Id: I46bb3074484853682c75ddc417e77b6ae846136c
Revert "Fix decoder EOS handling"

 * This is causing carnage for apps and games which make assumptions
   about the (bad) behavior of EOS handling. While this patch makes
   it consistent across the board, let's stay bug-for-bug compatible.
 * L is going to break a lot of shit :(

This reverts commit ff9a42d3c4460714dcb963f1a9f22f06a8f7fc8d.

Change-Id: Iab33edf64f5ec02e4391713e2bd0630ea056b3fd