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Update RELEASENOTES.md for the Media3 1.11.0 stable release

PiperOrigin-RevId: 958354611
(cherry picked from commit 1e1d3193a71d25934649040a382191442b70d72e)
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michaelkatz committed
e156aec119c304d3de70a2fa69e08dc585b9d92b
Parent: 458b232