stagefright: Fix audio profile retrieved

The aac audio profile retrieved from the AACExtractor
is ranged from 0-3.
However the corresponding OMX header definition
is from 1-4:
typedef enum OMX_AUDIO_AACPROFILETYPE{
...
OMX_AUDIO_AACObjectMain = 1,
OMX_AUDIO_AACObjectLC,
OMX_AUDIO_AACObjectSSR,
OMX_AUDIO_AACObjectLTP,
...

Change-Id: I1c8932abe19bff918acd5e4d8c2e39eaaac4f6c3