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https://github.com/w3c/webauthn/pull/1530 specifies a method for
encoding language and direction information in strings that will be
stored on authenticators. Since we may start to see this in credentials
in the wild, this change adds examples to the UI test so that we see
what they'll look like.

(On Linux, at least, they at least don't render as garbage or crash.
However the zh-Hant example doesn't display, possibly because I'm
missing suitable fonts.)

Change-Id: I9e778a08df85b8ae34032341c6bcd84291ff210c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2576795
Commit-Queue: Martin Kreichgauer <martinkr@google.com>
Auto-Submit: Adam Langley <agl@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#834370}