stagefright: OMXCodec: Re-enable OMX.TI.Video.encoder's quirks

These have been around since early stagefright, and were dropped for
JB. Unfortunately, they're still necessary with for this encoder to
work.

Change-Id: I8a251bf195a24b166db7464a90a822d6e69b644d

libstagefright: Add support for the 720P OMAP3 encoders

Bring back some more OMAP code that was removed by Google in JB,
and a couple of omapzoom patches.
This may stop being necessary if TI publishes JB-specific OMAP3
code, but as long as we're using the ICS domx, these need to
be here
Change-Id: Ia29f8c9f9ed769ba07b09c07260486f6502841d6

libstagefright: Unbreak OMAP4 encoders

The "manual" construction of the h264 codec data is only needed
on OMAP3. Execution of this code on OMAP4 breaks the mpeg4 header
generation

Change-Id: I3ae52f2e685e2d9097796685c98dffa93cfa6430