How can i add padding vector file in android

wrap your path tags with group tag. then and add attribute scaleX, scaleY, pivotX and pivotY in group tag to create padding effect. like this:

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="48dp"
        android:height="48dp"
        android:alpha="0.6"
        android:viewportHeight="24.0"
        android:viewportWidth="24.0">
    <group
        android:scaleX="0.5"
        android:scaleY="0.5"
        android:pivotX="12"
        android:pivotY="12">
        <path
            android:fillColor="#FF000000"
            android:pathData="M3,4L3,1h2v3h3v2L5,6v3L3,9L3,6L0,6L0,4h3zM6,10L6,7h3L9,4h7l1.83,2L21,6c1.1,0 2,0.9 2,2v12c0,1.1 -0.9,2 -2,2L5,22c-1.1,0 -2,-0.9 -2,-2L3,10h3zM13,19c2.76,0 5,-2.24 5,-5s-2.24,-5 -5,-5 -5,2.24 -5,5 2.24,5 5,5zM9.8,14c0,1.77 1.43,3.2 3.2,3.2s3.2,-1.43 3.2,-3.2 -1.43,-3.2 -3.2,-3.2 -3.2,1.43 -3.2,3.2z"/>
    </group>

</vector>

*pivot values depends on size of width and height of your vector