[ShapeableImageView] Call invalidateOutline when shape is changed

Resolves #1769

PiperOrigin-RevId: 342118551

Author: drewhamilton

catalog/java/io/material/catalog/imageview/res/layout/catalog_imageview.xml

@@ -66,7 +66,7 @@
     app:strokeColor="?attr/colorSecondary"
     app:shapeAppearance="?attr/shapeAppearanceMediumComponent"
     app:strokeWidth="1dp"
-    app:elevation="5dp"
+    android:elevation="5dp"
     android:padding="8dp"
     app:srcCompat="@drawable/dog_image" />
 
@@ -85,7 +85,7 @@
       android:layout_height="wrap_content"
       android:adjustViewBounds="true"
       android:scaleType="fitXY"
-      app:elevation="5dp"
+      android:elevation="5dp"
       app:shapeAppearance="@style/ShapeAppearanceImageLeft"
       app:srcCompat="@drawable/cat_image"
       app:strokeColor="?attr/colorSecondary"
@@ -99,7 +99,7 @@
       android:layout_weight="1"
       android:adjustViewBounds="true"
       android:scaleType="fitXY"
-      app:elevation="5dp"
+      android:elevation="5dp"
       app:shapeAppearance="@style/ShapeAppearanceImageRight"
       app:srcCompat="@drawable/cateyes_image"
       app:strokeColor="?attr/colorSecondary"

lib/java/com/google/android/material/imageview/ShapeableImageView.java

@@ -146,6 +146,9 @@ public void setShapeAppearanceModel(@NonNull ShapeAppearanceModel shapeAppearanc
     }
     updateShapeMask(getWidth(), getHeight());
     invalidate();
+    if (VERSION.SDK_INT >= 21) {
+      invalidateOutline();
+    }
   }
 
   @NonNull