Update the doc for VectorDrawable's Tint support

b/21726146

Change-Id: I262f77b980afa81407b008276190062974cdc4fa
diff --git a/docs/html/training/material/drawables.jd b/docs/html/training/material/drawables.jd
index a2de8e9..c58075e 100644
--- a/docs/html/training/material/drawables.jd
+++ b/docs/html/training/material/drawables.jd
@@ -36,8 +36,9 @@
 resources (for example, <code>?android:attr/colorPrimary</code>). Usually, you create these assets
 only once and color them automatically to match your theme.</p>
 
-<p>You can apply a tint to {@link android.graphics.drawable.BitmapDrawable} or {@link
-android.graphics.drawable.NinePatchDrawable} objects with the {@code setTint()} method. You can
+<p>You can apply a tint to {@link android.graphics.drawable.BitmapDrawable}, {@link
+android.graphics.drawable.NinePatchDrawable} or {@link
+android.graphics.drawable.VectorDrawable} objects with the {@code setTint()} method. You can
 also set the tint color and mode in your layouts with the <code>android:tint</code> and
 <code>android:tintMode</code> attributes.</p>