Fix icy metadata title

[bastengao]

metaGroup may have multiple itmes, for example below.

<AVTimedMetadataGroup: 0x6000016cc0b0, timeRange={{418176/44100 = 9.482}, {1/44100 = 0.000}}, items=(
    "<AVMutableMetadataItem: 0x6000014dcf60, identifier=icy/StreamTitle, keySpace=icy, key class = __NSCFConstantString, key=StreamTitle, commonKey=title, extendedLanguageTag=(null), dataType=(null), time={418176/44100 = 9.482}, duration={1/44100 = 0.000}, startDate=(null), extras={\n}, value class=__NSCFString, value=Johann Sebastian Bach - Brandenburg Concerto No.3 in G major (1)>",
    "<AVMutableMetadataItem: 0x6000014dcfe0, identifier=icy/UTC, keySpace=icy, key class = NSTaggedPointerString, key=UTC, commonKey=(null), extendedLanguageTag=(null), dataType=(null), time={418176/44100 = 9.482}, duration={1/44100 = 0.000}, startDate=(null), extras={\n}, value class=__NSCFString, value=20230627T100653.383>"
)>

I reference react-native-track-player , it's better to use common identifier to retrieve title.

[markfili]

Hi, @bastengao, sorry for such a late response, I've missed this. If you still use this repo, please rebase your pull request on the latest master branch and I will merge it.