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This change changes the wording for the caBLE UI when doing caBLEv2
serverlink. The dialog now contains a link (“Didn't get it?”) which
triggers a new dialog state that instructs the user to connect the phone
via USB cable.

BUG=1002262

Change-Id: I292fe39455cbef296ec6088a7d4ff8a309ff066b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2630740
Commit-Queue: Adam Langley <agl@chromium.org>
Auto-Submit: Adam Langley <agl@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#845020}