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This change causes the human-readable form of the CBOR errors to be
included in log messages and also logs messages from parse errors in
GetInfo requests (which are handled differently).

This would have been helpful when figuring out why the Solo Key wasn't
working as a CTAP2 device.

Change-Id: I11f241a740a50a4f0b1edb45e4d535a193561a93
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1565088
Commit-Queue: Adam Langley <agl@chromium.org>
Reviewed-by: Martin Kreichgauer <martinkr@google.com>
Cr-Commit-Position: refs/heads/master@{#650640}