Unity 3D AR existing project modification

We have built a measure app on Unity which also exports a 2D floor plan image of the room with measurements. The task: 1. Tidy the UI as per the design provided. 2. Currently user has to provide a path of the image and name to save. This has to be automated and saved in app folder. 3. Write the path on the image file in a orders file with a unique name given to the unity app by the android app. As there is not way for the Unity app to pass back information to android native app, this is the best way to communicate. 4. The Unity app will be called from the android Activity and will be included as a library file. So an Order number will be passed to the unity app which you need to handle from this app and using this number create a communication text file mentioned in Task 3. 5. You will also have to thicken the drawing strokes and change stroke color. This is relatively an easy task as the major part of the work (AR Related) has already been done by my developer. Bid only if you can complete this in 2-3 days.