[kernel] Correctly translate PropertyAccess of a static class member.
[kernel] Correctly translate PropertyAccess of a static class member.

This handles the case of null-aware static member access `C?.foo`, as
well as fully qualified static member access `h.C.foo`.

BUG=
R=kmillikin@google.com

Review URL: https://chromereviews.googleplex.com/476957013 .

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