Choose MediaSource based on content-type header or sniffing data

If the client hasn't explicitly provided a MIME type, and ExoPlayer couldn't find any suitable extractor based on the source URI, then fall back to consider the content-type header from the response to the source.

i.e. I have a MediaItem who's URI looks like https://example.com/path_without_extension. I don't explicitly set the MIME type. Despite making a request to the source and the source responding with "content-type: application/vnd.apple.mpegurl", ExoPlayer still throws Caused by: androidx.media3.exoplayer.source.UnrecognizedInputFormatException: None of the available extractors (FlvExtractor, FlacExtractor, WavExtractor, FragmentedMp4Extractor, Mp4Extractor, AmrExtractor, PsExtractor, OggExtractor, TsExtractor, MatroskaExtractor, AdtsExtractor, Ac3Extractor, Ac4Extractor, Mp3Extractor, AviExtractor, JpegExtractor, PngExtractor, WebpExtractor, BmpExtractor, HeifExtractor, AvifExtractor) could read the stream. {contentIsMalformed=false, dataType=1}