* Fix aac_decoder memory leak
Only call NeAACDecInit on the first AAC frame and create new NeAACDecoder on DecoderCommand::Init request
* update license headers
* fix oversight
* reorganized code
-put open new FAAD2 AAC decoder code into a separate function
-removed LOG_INFO for open/close FAAD2 AAC decoder
-added LOG_ERROR when no decoder is created to handle decode request, either decoder creation failed or DecoderCommand::Init command not received
* Update aac_decoder.cpp
fix clang coding style check
* fix load savestate
Loading a savestate creates a situation where decode requests aren't preceded by an init request, so we open a new decoder by default in the constructor. A new AACDecoder instance is always constructed on load savestate.
