Android: Create Serial Driver Interface

[HTRamsey]

Create interface for accessing android java serial functions. The last step after this is to rebase QSerialPort class to the latest QtSerialPort version

[DonLakeFlyer]

So what the overall summary to the changes here? Use latest USB support on the Java side of things? Then create a custom QSerialPort which calls into that? How does it differ from the old code?

[HTRamsey]

So I had already updated the Java serial code previously, this just provides a direct cpp interface to the java code in AndroidSerial.cpp and fills in the remaining missing Java functions for QSerialPort cpp functions that weren't implemented (flow control, control lines, break, pinoutsignals, etc). The custom Android QSerialPort already existed, so this just cleans it up to use AndroidSerial.cpp and implements those remaining missing functions.

My comment about rebasing QSerialPort is about updating the QSerialPort and QSerialPort_Android to use the latest QSerialPort from the QtSerialPort module, which is like 8 years newer than the current QSerialPort that this code is based on.

Edit: I removed a few of the unnecessary changes that will be made later when QSerialPort is updated