Merge "Update the QUIC packet format." am: 1dd1530647 am: 7240385821

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

Change-Id: Iacbd4e8df6d926cf55e7a198ccd89be97bd2accc
tree: cb6d68ff532379b1ddcd793084c555889932983e
  1. tests/