Merge "contexthub: Clarify nanoapp persistence"

     *

     * Loading a nanoapp must not take more than 30 seconds.

     *

     * Depending on the implementation, nanoApps loaded via this API may or may

     * not persist across reboots of the hub. If they do persist, the

     * implementation must initially place nanoApps in the disabled state upon a

     * reboot, and not start them until a call is made to enableNanoApp(). In

     * this case, the app must also be unloaded upon a factory reset of the

     * device.

     *

     * @param hubId identifer of the contextHub

     *        appBinary serialized NanoApppBinary for the nanoApp

     *        transactionId transactionId for this call