[CrOS MultiDevice]

Note: This component is in the process of being built. It will eventually contain implementation that was previously part of //components/cryptauth and //components/proximity_auth.

This component contains the implementation of two APIs: (1) DeviceSync API: This API syncs metadata about other devices tied to a given Google account. It contacts the CryptAuth back-end to enroll the current device and sync down new data about other devices. (2) SecureChannnel API: This API gives clients the ability to establish connections to remote devices synced via the DeviceSync API. Once a communication channel is established, the API allows clients to send and receive messages through the channel.