(BlackBerry) Fix a few overlay issues.

So bad mistake on my part. A missed break in a case statement caused joypad scans to fall through to the touchscreen. Caused bad key presses on unmapped players. The other fixes are due to the bezel on PlayBook/BB10 extending past the screen resolution causing touches to wrap around. Also make sure RETRO_DEVICE_POINTER is handled properly.

Give it a try to make sure it fixes the issues you've seen with MAME and other cores.