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U2F and CTAP share same BLE GATT service UUID and service
characteristics. Furthermore, BLE transport specification for CTAP is a
strict superset of U2F BLE transport specifications. All transport
specifications including fragmentation, request, and response
structure are the same. CTAP protocol simply  adds cancel command to the
list of commands. Rename all Ble related objects to have Fido as prefix.

Bug: 814474
Change-Id: I1978e4b536337e97311cb8c651a8d95256a75c6e
Reviewed-on: https://chromium-review.googlesource.com/929805
Commit-Queue: Jun Choi <hongjunchoi@chromium.org>
Reviewed-by: Jan Wilken Dörrie <jdoerrie@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543829}