OMXCodec: Don't log informational messages as errors

Change OMXcodec's informational messages from LOGE to LOGI, so that
logcat isn't spammed with "errors" such as:

E/OMXCodec(  124): Successfully allocated OMX node 'OMX.google.vorbis.decoder'
E/OMXCodec(  124): Attempting to allocate OMX node 'OMX.google.vorbis.decoder'

They now appear as:

I/OMXCodec(  124): Successfully allocated OMX node 'OMX.google.vorbis.decoder'
I/OMXCodec(  124): Attempting to allocate OMX node 'OMX.google.vorbis.decoder'

Change-Id: I5d0b8f16d1d7fe957e284b096e8208f70957afd5