Add Mobile Vitals support

[bruno-garcia]

Add support to Mobile Vitals:

https://blog.sentry.io/2021/08/23/mobile-vitals-four-metrics-every-mobile-developer-should-care-about

[github-actions]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you label it Status: Backlog or Status: In Progress, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀