Add index of platform vulnerabilities that Flutter developers should be aware of

[ash2moon]

Adds documentation for an Android specific vulnerability (StrandHogg in a new index of platform-specific vulnerabilities.

Resolves #11828

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[flutter-website-bot]

Visit the preview URL for this PR (updated for commit d71ecd6):

https://flutter-docs-prod--pr11829-main-6ppfucvy.web.app

[jmagman]

My gut here is that we shouldn't be directly documenting platform issues that aren't Flutter specific, but instead link to external resources where it makes sense. Our own version will be very incomplete and likely out-of-date.
I think targeted warnings in the tool are more effective (flutter/flutter#144484) where we can directly make an actionable suggestion (raise your min SDK).

I'd love to hear @sfshaza2 opinion though.

(and sorry @ash2moon I know this one looked like an easy one to pick off, my bad)

[sfshaza2]

I agree with @jmagman, 100%. If there's a place in the Android docs that lists these things, I'd be happy to link to it. Perhaps a new, but short, page here: https://docs.flutter.dev/platform-integration/android

But, we don't have the resources to keep something like this up to date.