Merge changes Ib63ab95a,I585b0610,Ia84da0b5 into honeycomb-mr1

* changes:
  UsbManager: Hide APIs not needed for USB host or accessory support.
  Remove MtpClient class from framework and public API
  UsbDevice: Move IO related methods to new UsbDeviceConnection class
tree: aab456746a87080f3777cd2506e94fae18f43931
  1. cmds/
  2. include/
  3. libs/
  4. opengl/
  5. services/
  6. vpn/
  7. MODULE_LICENSE_APACHE2
  8. NOTICE