[ Merge of http://go/wvgerrit/119230 ]
This patch adds an annotation to the one place in the codebase where we
intentionally fall through between switch statement cases, in order to
appease stricter compilers.
Bug: 182058081
Test: compile, WV unit/integration tests
Change-Id: I004a6a6e61681fcf22c6bf25d9b0284b8b64e776
a828bf5f58