UsbSerial Versions Save

• Added UC-232A Serial Port from ATEN manufacturer

• Added an example using the synchronous api.
• Solved a bug in syncRead method when a FTDI device is connected and timeout is set to 0.

• Solved some minor issues.
• Added a method "isSupported" to know wether a device is supported or not in a easier way.

-SPI interface added -CP2103 support added

CH340 new driver implemented with more baud rates, RTS/CTD, DTR/DSR and Parity

FTDI synchronous read problem solved

Added synchronous write and read operations

RTS/CTS and DTR/DSR flow control signals added for CP210x and FTDI devices.

UsbSerial updated to Android Studio