libstagefright: Check for H.264 profile when using sw decoder.

- Adds a check for the video profile when configuring the H.264
software decoder. Returns error unsupported if the profile
is not supported by the decoder.

Conflicts:

	media/libstagefright/OMXCodec.cpp

Change-Id: I38ad7db7bd7c623b26b75e4cf97db196b5bafe25