AVReader: update how to display metadata of input file

* Need only one parameter: an OFX String (multilines).
* Get metaData to display from avtranscoder::getMetadatasToDisplay.
* Reset these OFX parameters if the input file is not init.
AVReader: add OFX params for format and video AVOption details

* Add _paramFormatDetailCustom and _paramVideoDetailCustom to contains
all OFX params corresponding to the AVOption which depend on the format
or the video codec.
* Add function the fecth and manage these OFX parameters.
* Update the factory to create the OFX parameters.
AVWriterFactory: clean comments
AudioVideo: refactoring fetchCustomParams

* Move fetchCustomParams functions to common/util.
* Remove them in AVReader and AVWriter.
AudioVideo: refactoring disableAVOptionsForCodecOrFormat

* Move disableAVOptionsForCodecOrFormat functions to common/util.
* Rename disableAVOptionsForCodecOrFormat to
disableOFXParamsForFormatOrCodec.
* Add doc about the function.
* Remove it in AVReader and AVWriter.
AVReader: update how to display MetaData of inputFile

Get one OFX String parameter (multilines) per part in the file:
     * wrapper.
     * video streams.
     * audio streams.
     * data streams.
     * subtitle streams.
     * attachement streams.
     * unknown streams.