fix: llHLS does not need forcedTimestampOffset

[adrums86]

Description

timestampOffset was being reset on LL-HLS quality changes. We only want to force timestampOffset changes on rendition switches for .ts segments due to the timestamp rollover problem in those containers.

Specific Changes proposed

Check if the current media is fmp4, if it is don't force the timestampOffset reset after a resync of the segment loader.

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.27%. Comparing base (ddc9374) to head (0110e24).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1501   +/-   ##
=======================================
  Coverage   86.27%   86.27%           
=======================================
  Files          43       43           
  Lines       10884    10886    +2     
  Branches     2504     2506    +2     
=======================================
+ Hits         9390     9392    +2     
  Misses       1494     1494           

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