mm-video-v4l2: Decrement input heap buffer counter for free_buffer

When OMX component transitions from
OMX_StateIdle -> OMX_StateLoaded -> OMX_StateIdle,
if OMX client submitting new set of buffers while
OMX_StateLoaded->OMX_StateIdle transition, use_buffer failure is observed.
Decrement input heap buffer counter while freeing buffers.

Change-Id: I5d98d701d8ede62a8a98dff4a7cd98335dc916ce
CRs-Fixed: 1094101
1 file changed