Merge "mark more hals as optional in frozen matrix." am: 55b2fddbb7 am: 296b7cfd1c am: 9ea3ab0ea0 am: f34b9e2332

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/1471261

Change-Id: I9c63128a41271a4a5e4baee30232513c18251d63