* Updated stream code to handle special cases when stream value is 0x01 or 0x02
* Removed extra definitions and updated tests to account for special case
* Modified stream.cpp so that each thread assigned a unique stream ID when hipStreamPerThread is used as stream value. Modified tests to check that threads are assigned unique, repeated values when hipStreamPerThread is called
* Updated idx_offset, stream_map, and thread counter to be in one struct.
* Update stream.cpp to only use add_stream() and update tests for seperate unit test for hipStreamPerThread
* Remove unecessary comment
* Removed unecessary line
* Updated tests and stream.cpp to update stream ID correctly
* Updated test structure
itrowbri