audioflinger: Add missing code for FM volume

 * If we used a proper MR2 audio HAL, this wouldn't be needed,
   but building FM support with the hacked up MR1 audio HAL we
   uses fails miserably. Adding this back fixes that.

Change-Id: If2f6ee9e417732eaf4df8718bf73b2dfd1062011
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: Ib4b5222b4b64d42288e0ad5c95910e385d172374