* Margaux dev.

* Support Pad, Activation, Mul operator for mnasnet

* Support document enhance model

* Apply add-init-cache-and-preemption patch

* Refine code

* Add APU int16 quantization and fix macro bugs

* Refine code
Co-authored-by: NYungChien Hsu <yungchien.hsu@mediatek.com>
Co-authored-by: NEric Chen <eric-yk.chen@mediatek.com>