WiFi USB dongle #4 driver is updated

WPS feature is verified with WiFi USB dongle #3 and #4

Add support for Hanns.G HT231HPB Touchscreen

Fix the wrong touch coordinate when HDMI screen is rotated on portrait

Supporting Pinch Zoom-In/Out with mouse-wheel.

Roll back the Mali driver to r3p1 from r4p0 for better stability/compatibility.

Fix the wrong Kernel configuration for VPN function.

We've merged the Kernel source into the Android repo. Android build-script also includes the Kernel compile.

Fix the multi-user mode problem.