Profiler-IsEnabled (#1503)
Avoid use of Hungarian naming convention for cross-platform API code.
I'm taking my cue here from the "ONNX Runtime coding conventions and standard" document which say we use the "Google C++ style guide", and that says "Do not use Hungarian notation"
https://github.com/microsoft/onnxruntime/blob/master/docs/Coding_Conventions_and_Standards.md
https://google.github.io/styleguide/cppguide.html#Windows_Code
X-ref: internal PR 4824
