Clean up Internal include directive. 

Currently, we use the short file name as an internal include.

```cpp
#include "sdkwrapper.hpp". 
```
But, this is against the [google style guild](https://google.github.io/styleguide/cppguide.html#Names_and_Order_of_Includes). 

It should be 
```cpp
#include "src/sdk/sdkwrapper.hpp"
```
