SF: Move isWithin into implementation
Update the comment for the freeze timeline at the vsync time.

BUG: 343603085
Test: atest VSyncPredictorTest
Flag: com.android.graphics.surfaceflinger.flags.vrr_bugfix_24q4

Change-Id: I78cbe386983d7f8cefaab1d3b0e94f0a034815af
2 files changed