h265parse: Don't duplicate VPS/SPS/PPS per config-interval if exists

Don't need to manually insert VPS/SPS/PPS since inband data could be useable.

Also fixes #824
3 jobs for issue-824 in 8 minutes and 43 seconds (queued for 4 minutes and 44 seconds)
Status Name Job ID Coverage
  Preparation
passed manifest #53775

00:00:21

 
  Build
passed build fedora x86_64 #53776

00:04:30

 
  Full Builds
passed build android arm64 api28 #53777

00:03:50