Do you create the MDPI drawable first and just scale it accordinly to the .075/1.00/1.50/2 ratio by pixels in photoshop or do you recreate each individual drawable?
As of Android L there is a VectorDrawable which is like the SHAPE from SVG but in Android's XML style
see Android documentation:
https://developer.android.com/training/material/drawables.html#VectorDrawables