Add stroke width property used by animated vector drawables

This is for example used in displaying a checked radio button.

Test: Modified widget render test to include a checked radio button
Change-Id: I43074ce038f69f28c0cf5fb396d393722b02b142

tools/layoutlib/bridge/src/android/graphics/drawable/VectorDrawable_Delegate.java

@@ -571,6 +571,8 @@ public class VectorDrawable_Delegate {
         @NonNull
         public Consumer<Float> getFloatPropertySetter(int propertyIdx) {
             switch (propertyIdx) {
+                case STROKE_WIDTH_INDEX:
+                    return this::setStrokeWidth;
                 case STROKE_ALPHA_INDEX:
                     return this::setStrokeAlpha;
                 case FILL_ALPHA_INDEX:

tools/layoutlib/bridge/tests/res/testApp/MyApplication/src/main/res/layout/allwidgets.xml

@@ -263,7 +263,8 @@
             android:id="@id/radioButton2"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="New RadioButton" />
+            android:text="New RadioButton"
+            android:checked="true" />
 
     </RadioGroup>