Make ShapeAppearanceModel immutable

PiperOrigin-RevId: 266378228

Author: cketcham

lib/java/com/google/android/material/shape/CornerTreatment.java

@@ -36,7 +36,7 @@ public class CornerTreatment implements Cloneable {
 
   private static final String TAG = "CornerTreatment";
 
-  protected float cornerSize;
+  protected final float cornerSize;
 
   public CornerTreatment() {
     // Default Constructor has no size. Using this treatment for all corners will draw a square
@@ -70,10 +70,6 @@ public float getCornerSize() {
     return cornerSize;
   }
 
-  public void setCornerSize(float cornerSize) {
-    this.cornerSize = cornerSize;
-  }
-
   @NonNull
   @Override
   public CornerTreatment clone() {

lib/java/com/google/android/material/shape/MaterialShapeDrawable.java

@@ -67,8 +67,7 @@
  * Base drawable class for Material Shapes that handles shadows, elevation, scale and color for a
  * generated path.
  */
-public class MaterialShapeDrawable extends Drawable
-    implements TintAwareDrawable, ShapeAppearanceModel.OnChangedListener, Shapeable {
+public class MaterialShapeDrawable extends Drawable implements TintAwareDrawable, Shapeable {
 
   private static final float SHADOW_RADIUS_MULTIPLIER = .75f;
 
@@ -204,10 +203,6 @@ public void onEdgePathCreated(@NonNull ShapePath edgePath, Matrix transform, int
             edgeShadowOperation[count] = edgePath.createShadowCompatOperation(transform);
           }
         };
-
-    // Listens for modifications made in the ShapeAppearanceModel, and requests a redraw if the
-    // ShapeAppearanceModel has changed.
-    drawableState.shapeAppearanceModel.addOnChangedListener(this);
   }
 
   @Nullable
@@ -237,9 +232,7 @@ private static int modulateAlpha(int paintAlpha, int alpha) {
    */
   @Override
   public void setShapeAppearanceModel(@NonNull ShapeAppearanceModel shapeAppearanceModel) {
-    drawableState.shapeAppearanceModel.removeOnChangedListener(this);
     drawableState.shapeAppearanceModel = shapeAppearanceModel;
-    shapeAppearanceModel.addOnChangedListener(this);
     invalidateSelf();
   }
 
@@ -828,11 +821,6 @@ public void setScale(float scale) {
     }
   }
 
-  @Override
-  public void onShapeAppearanceModelChanged() {
-    invalidateSelf();
-  }
-
   @Override
   public void invalidateSelf() {
     pathDirty = true;