Uplfit to Beta: Update targetSdk to 35 and use enableEdgeToEdge

[wmontwe]

Update targetSdk to 35 and use enableEdgeToEdge

Please ensure that your pull request meets the following requirements - thanks!

Uplift of #9460

[thunderbird-botmobile]

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[Approval Request]
Original Issue/Pull request: #9460
Regression caused by (issue #): Patch missed the last beta merge.
User impact if declined: We can't publish to the Google Play Store beginnin August 31th 2025.
Testing completed (on daily, etc.): daily, debug
Risk to taking this patch (and alternatives if risky): Visual regression as edge-to-edge has impact on every app screen.

[asoucar]

LGTM