libstagefright: fix drainInputBuffers for FlushCompleteEmulation Quirk

Codecs which use the "requires-flush-complete-emulation" require
flushing (draining) the buffers before filling them. The change
"accelerate camera recording start up speed" has changed the order
of filling and draining the buffers which doesn't work well with
the FlushCompleteEmulation quirk

Change-Id: I78193f0aca4a85455393a4cf20d33b919ea6a57e
stagefright: update OMAP3 h264 codec data construction

Changes are based on gingerbread branch and they help improve
video stuttering on OMAP3.

Change-Id: Ic886a4c555c2a7a41204e7a18f38560744b782f6
libstagefright: update OMAP3 support

* Move the OMAP_ENHANCENEMENT flag to make sure that the
  buffer is not modified futher on.
* Don't queue more than 4 buffers to the component. This
  greatly improved the video recording framerates both for
  480P and 720P.

Change-Id: Iacc983214d873099e8f6218f374717a2ae4ffcc8