Performance Updates

Added a Frame Analysis tab to the Performance page.
When analyzing a janky Flutter frame,
this view provides hints for how to diagnose the jank and
detects expensive operations that might have contributed
to the slow frame time. This view also shows a breakdown of
your Flutter frame time per phase (Build, Layout, Paint, and Raster)
to try to guide you in the right direction
    
      #4339

Changelog

More details about changes and fixes are available in the DevTools
changelog.