[Doc] Update native mapping doc for NNAPI and ONNX

[Christywl]

https://github.com/intel/webml-polyfill/blob/master/docs/native_mapping.md

Need add the following ops into native mapping doc:

• TRANSPOSE
• BATCH_TO_SPACE_ND
• MAXIMUM
• TANH
• ARGMAX
• LOGISTIC
• PRELU

[mingmingtasd]

https://docs.google.com/spreadsheets/d/1PoS_lhr7wsO-jW0FYM9ecvAADPMfXxZJFu5oaIJOwCs/edit?usp=sharing I have updated mapping doc for NNAPI and ONNX, please help to review these highlighted contents, thanks! @huningxin

[huningxin]

Thanks @mingmingtasd . For argument mapping, please keep it simple. It is just needed to list the parameter name in native API with necessary information. It isn't needed to copy and paste all content from native API documentation. Please refer to previous ones as example.

[mingmingtasd]

Thanks @mingmingtasd . For argument mapping, please keep it simple. It is just needed to list the parameter name in native API with necessary information. It isn't needed to copy and paste all content from native API documentation. Please refer to previous ones as example.

I have updated this doc as you suggested. Thanks! @huningxin

[huningxin]

Thanks @mingmingtasd ! NNAPI column looks good and I merged it.

For ONNX part, we may need to remove that column as it is not used for implementation. @belem , any thoughts?

[mingmingtasd]

Merged, so close this issue.