Update the QUIC packet format. am: a4eeed0833

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/12832476

Change-Id: I3a90010f445b5eb2fcdf5fee677295e1743edd99
tree: 13db6c9989d06528f161ab31ba05793409bfb6a3
  1. tests/