libstagefright: Fix for crash during playback of unsupported clip

-Crash in media server observed during playback of unsupported clip
-The OMX_EventError not handled properly in SF IL client leading
to crash as i/p buffers and o/p buffers are not freed.
-Shutting down the i/p and o/p ports when OMX_EventError is
received with state OMX_ErrorInvalidState. In error state,
free i/p and o/p buffers on receiving empty buffer done and
fill buffer done messages.

Change-Id: I6d2b7b659b5f424b9fc5d668e47f2a9d51b49314
CRs-Fixed: 331572

Conflicts:

	include/media/stagefright/OMXCodec.h
	media/libstagefright/OMXCodec.cpp