DO NOT MERGE: SurfaceControl: Ensure unused fields are zeroed
Otherwise we could leak uninitialized memory to
an untrusted process.
Bug: 214999987
Test: Existing tests pass
Change-Id: I87993fbb920b3af938a311e6afc15383d571823a
(cherry picked from commit c2cf02c1)
(cherry picked from commit 34fe38b0)
Merged-In: I87993fbb920b3af938a311e6afc15383d571823a