SoftVorbis: Set the right encoding in the port definition

Previously, it set the encoding type to AAC, which is just a typo.

Change-Id: I2dcae1f579e9feb0b35b6f5d334028c534275042
SoftAMR: Signal the right frame format

The correct enum for the format used is OMX_AUDIO_AMRFrameFormatFSF,
which is the same as is used in amrnb/enc/SoftAMRNBEncoder.cpp,
amrwbenc/SoftAMRWBEncoder.cpp and in OMXCodec and ACodec.

The OMX_AUDIO_AMRFrameFormatConformance enum refers to an odd file
format only used for conformance tests, not used in the wild.

Change-Id: Idc395fc1d4969e33453522d6ec6526876438c526