Added ListAdapter and refresh button USB devices

1. List Adapter showing Product ID, Vendor ID and Name of USB device
2. Refresh button to refresh the USB device list.

When the UsbEnum activity is open and USB device is attached, the
UsbIntent activity opens up. Think of a way to resolve that.

Better names needed than the device address. It should be looked
into after getting the divecomputer.

Signed-off-by: Venkatesh Shukla <venkatesh.shukla.eee11@iitbhu.ac.in>