[ Merge of http://go/wvgerrit/144530 ]
It's time to copy all the v17 work to our main branch.
I had to re-run clang-format to match local style.
Merge from commit b14f08374f9a48aed49850cc230daf384725b15f
Fix allow_null for key control iv in L3 v17
Bug: 161477208
Test: GtsMediaTestCases on sunfish
Change-Id: I97caa851e9e65eb0e42034d2f4a28dfb7499df0d