Merge "init.usb.rc: set sys.usb.config to none before changing it" into jb-mr1.1-dev

# Used to set USB configuration at boot and to switch the configuration

# when changing the default configuration

on property:persist.sys.usb.config=*

    setprop sys.usb.config none

    setprop sys.usb.config ${persist.sys.usb.config}