public void storeOriginals() {
            mStartingStartTrim = mStartTrim;
            mStartingEndTrim = mEndTrim;
            mStartingRotation = mRotation;
        }
If the start / end trim are offset to begin with, store them so that
animation starts from that offset.
ptr-lib/src/in/srain/cube/views/ptr/header/MaterialProgressDrawable.java