feat: droiddeckctl pacing reports the frames that reached the screen
Reads SurfaceFlinger's timestats for the game's layer (or the session's
SurfaceView) over a capture: frames on screen, fps on screen, the
present-to-present histogram and how many intervals were off the usual
cadence. Records split by a refresh-rate change are summed. A game's own fps
counter counts frames handed over, so it can't show dropped or doubled frames.
Co-authored-by: angelrenefm <17342133+angelrenefm@users.noreply.github.com>
