am 474bb82f: Merge "Clarify docs for BackupTransport.initializeDevice()" into mnc-dev

     * this is called, {@link #finishBackup} will be called to ensure the request

     * is sent and received successfully.

     *

     * <p>If the transport returns anything other than TRANSPORT_OK from this method,

     * the OS will halt the current initialize operation and schedule a retry in the

     * near future.  Even if the transport is in a state such that attempting to

     * "initialize" the backend storage is meaningless -- for example, if there is

     * no current live dataset at all, or there is no authenticated account under which

     * to store the data remotely -- the transport should return TRANSPORT_OK here

     * and treat the initializeDevice() / finishBackup() pair as a graceful no-op.

     *

     * @return One of {@link BackupTransport#TRANSPORT_OK} (OK so far) or

     *   {@link BackupTransport#TRANSPORT_ERROR} (on network error or other failure).

     *   {@link BackupTransport#TRANSPORT_ERROR} (to retry following network error

     *   or other failure).

     */

    public int initializeDevice() {

        return BackupTransport.TRANSPORT_ERROR;