drop shadow to a line in an android vector xml

dropShadow

<group
      android:translateX="1"
      android:translateY="1"
      >
    <path
        android:pathData="M4,19.5002L20,1.5002"
        android:strokeWidth="2"
        android:fillColor="#00000000"
        android:strokeColor="#ffffff"
        android:strokeLineCap="round"/>
  </group>
  <path
      android:pathData="M4,19.5002L20,1.5002"
      android:strokeWidth="2"
      android:fillColor="#00000000"
      android:strokeColor="#383836"
      android:strokeLineCap="round"/>