usb: add OTG descriptor for android gadget

usb: add OTG descriptor for android gadget

BZ: 27547

Add USB OTG Descriptor for android gadget, as we need to
support USB OTG function (Both USB Host and Device mode).

Change-Id: I56c6543745777f7e851f77b78eea3e909844f42c
Signed-off-by: Wu, Hao <hao.wu@intel.com>
Reviewed-on: http://android.intel.com:8080/39255
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@intel.com>
Reviewed-by: Wang, Feng A <feng.a.wang@intel.com>
Reviewed-by: Li, Wenji <wenji.li@intel.com>
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: Meng, Zhe <zhe.meng@intel.com>
Tested-by: Meng, Zhe <zhe.meng@intel.com>
Reviewed-by: Gross, Mark <mark.gross@intel.com>
Reviewed-by: Saripalli, Ramakrishna <ramakrishna.saripalli@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>