Merge "Update the QUIC packet format." am: 1dd1530647

Original change: https://android-review.googlesource.com/c/platform/cts/+/1454515

Change-Id: I76567c6de2ee21fd2027281e8aface2c943dd50d
tree: cb6d68ff532379b1ddcd793084c555889932983e
  1. tests/