Pause/Resume AppHangs

[philipphofmann]

Add an API that pauses/resumes reporting app hangs and ANR tracking. This API is required, especially for Flutter and React-Native, to prevent the Cocoa SDK from reporting wrongly detected app hangs when the OS shows a system dialog for asking specific permissions. Please update the docs on Flutter and React-Native to mention this problem similar to how we did that for Cocoa getsentry/sentry-docs#10409.

Tasks

Beta Give feedback

1. feat: Pause and resume AppHangTracking API sentry-cocoa#4077
   +0
2. Android
3. Add an API that pauses/resumes reporting app hangs sentry-dart#2116
   Platform: Dart +1
4. Pause/Resume AppHangs sentry-react-native#3909
   0 of 1
   Platform: React-Native +1

[romtsn]

Android works a bit differently, so I crossed it out - basically we just report the ANRs that resulted in process death. And system popups don't cause the main thread to hang afaik