Update basic supported browsers for 2024
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Drop Opera as a tested browser (from basic and modern)
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Drop Internet Explorer and Edge Legacy from basic
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Raise basic Chrome from 31+ (2013) to 49+ (2016)
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Raise basic Firefox from 39+ (2014) to 49+ (2016)
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Raise basic Safari from 9.1+ (2015) to 10+ (2016)
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Raise basic iOS Safari from 9+ (2015) to 10+ (2016)
Bug: T288287