libstagefright: support for disabling buffer metadata

- Metada mode video recording is enabled by default.
- use setprop debug.camcorder.disablemeta 1 to disable metadata mode recording.

Change-Id: I8ce90e633b262c5b2d1c9d7e367b7b5487b6d1b4
legacy OMX: squashed commit for legacy OMX support

This is a combination of 6 commits.

commit ff5604878d2bf74555adcf938ffbf98d04bea305
Author: Alexey Shavykin <ganster0x29@gmail.com>
Date:   Sun Oct 28 22:46:34 2012 +0200

    Added support legacy Qualcomm OpenMAX IL libs for MSM7x27

    Change-Id: I63e68e63fce955fef52813360032f5e8e90a4b92

commit 1a7ef5d4c8d1eebf1851b3b5b46c629a19a2c304
Author: WinSuk <goodboy735@gmail.com>
Date:   Wed Nov 14 23:03:24 2012 -0800

    Fix the encoder

    Change-Id: I929c769b24d0b891487faf4f0d3c9fa66e04eeef

commit 27cf702ac81f27cae206ef182420c1cbcdadb709
Author: Ganster41 <ganster0x29@gmail.com>
Date:   Mon Nov 19 15:35:36 2012 +0200

    Correct gralloc usage flags for renderer

commit 3feab8906fcb4464d5f46bc13dcae9da36e41040
Author: Conn O'Griofa <connogriofa@gmail.com>
Date:   Fri Jan 4 00:31:13 2013 -0200

    Fix legacy OMX encoders

    Ensure that a valid frame_rate is passed to the encoder, otherwise
    encoding will fail.

    Change-Id: Iaaa298496755ff405e393120973d1ed782f5d8f4

commit f03627bce1de975ad9b88206874dda851b7d2bf4
Author: Grigori Goronzy <greg@blackbox>
Date:   Sat Jan 19 18:26:25 2013 +0100

    Fix alignment and copy size for legacy QCOM OMX

    Change-Id: I6d13c67601da0f0c35d3dd455401f982406cefe3

commit 84296475a050e4775c01e9927fc4ad3c4f011150
Author: RonGokhale <cips173@gmail.com>
Date:   Sat Jun 22 12:28:02 2013 +0530

    msm7x27a: only submit one input buffer at a time

    This makes camcorder work without disabling metadata.

    Change-Id: I064bc64562520be1876d8125512e37df1fb0030f