Merge "Update the QUIC packet format." into nougat-cts-dev am: f6a0cdcba6

Original change: https://android-review.googlesource.com/c/platform/cts/+/1457991

Change-Id: Ie36145fb92e6efb20e6b15ca4b0dc57dafc63a92
tree: b34159dd265e9be7407fe0c2e559350fd75be088
  1. tests/