Add QuicFramerTest.CoalescedPacketWithZeroesRoundTrip
Add QuicFramerTest.CoalescedPacketWithZeroesRoundTrip

gfe-relnote: n/a, test-only
PiperOrigin-RevId: 249615801
Change-Id: Id5efb658b11c249e85415ca97b06a015fd1b87ad

google/quiche,google/quiche,google/quiche,google/quiche