Investigate JankStats library

[marandaneto]

Description

https://developer.android.com/topic/performance/jankstats (still in beta)

It could be a replacement for FrameMetricsAggregator
https://github.com/getsentry/sentry-java/blob/main/sentry-android-core/src/main/java/io/sentry/android/core/ActivityFramesTracker.java

The JanksStats library offers two additional capabilities that make it more dynamic and easier to use: jank heuristics and UI state.

[adinauer]

Could extract the data bag that's available and put it on the transaction when sending to Sentry.

[adinauer]

Related to getsentry/team-mobile#55

[marandaneto]

Android now recommends improving for 90fps, which means ~11ms per frame instead of 60fps/~16ms, maybe we can consider this when working on the Mobile vitals and how we define slow/frozen frames threshold.

[romtsn]

I feel like this is not needed anymore after we've implemented frame delay, #3099