Merge "Link to CDM guide from CDM javadoc"

/**

 * System level service for managing companion devices

 *

 * See <a href="{@docRoot}guide/topics/connectivity/companion-device-pairing">this guide</a>

 * for a usage example.

 *

 * <p>To obtain an instance call {@link Context#getSystemService}({@link

 * Context#COMPANION_DEVICE_SERVICE}) Then, call {@link #associate(AssociationRequest,

 * Callback, Handler)} to initiate the flow of associating current package with a

 * device selected by user.</p>

 *

 * @see CompanionDeviceManager#associate

 * @see AssociationRequest

 */

@SystemService(Context.COMPANION_DEVICE_SERVICE)