Android Updates for FP2 and FP3

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@babays @veeck @Niekess

Fairphone 3 beta program signup instructions - Signup closed!

Update: 2023-05-04 Applications are currently closed! Thanks to everyone who has applied The text below is only for reference. Requests coming in after today will be rejected (manually or automatically).

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Hi Fairphone 3 owners! Android 13 is coming, and we welcome some new testing volunteers The signup process remains the same as last time. See below for details. <a name="prerequisites-3" class=&…