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More fields have been added to a FIDL Semantic Node. This CL adds
support for those new fields.

Test: Updated existing unit tests.

Bug: fuchsia:41000
Bug: 973095
Change-Id: I7e397875206362ebf68e65b7466f6890255322da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1988160
Commit-Queue: Sharon Yang <yangsharon@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729491}