Miscellaneous fixups for VT contribution update.

fixed misc. spacing and style issues
AAVCAssembler/AHEVCAssembler: fix OOB reads in checkIFrameProvided,
  checkSpsUpdated and dropFramesUntilIFrame
ARTPWriter: fix OOB read in SpsPpsParser, VpsSpsPpsParser and sendVPSSPSPPSIfIFrame
ARTPWriter: use KMP algorithm for VpsSpsPpsParser
ARTPSource/ARTPConnection/RTPSource: rename jbTIme to jbTimeMs

Bug: 165061754
Change-Id: Iceeb3851aed0ba9b1c2c50b1a2378df06faa29d6