Remove cloneable from corner treatments since ShapeAppearance and CornerTreatments are now immutable

PiperOrigin-RevId: 266422300

Author: cketcham

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

@@ -32,7 +32,7 @@
  * setting `android:clipChildren="false"` in xml. `clipToPadding` may also need to be false if there
  * is any padding on the parent that could intersect the shadow.
  */
-public class CornerTreatment implements Cloneable {
+public class CornerTreatment {
 
   private static final String TAG = "CornerTreatment";
 
@@ -70,17 +70,6 @@ public float getCornerSize() {
     return cornerSize;
   }
 
-  @NonNull
-  @Override
-  public CornerTreatment clone() {
-    try {
-      return (CornerTreatment) super.clone();
-    } catch (CloneNotSupportedException e) {
-      throw new AssertionError(e); // This should never happen, because CornerTreatment handles the
-      // cloning, so all subclasses of CornerTreatment will support cloning.
-    }
-  }
-
   /**
    * Returns a new instance of this {@link CornerTreatment} for the given cornerSize. Extending
    * classes should override this method to return an instance of their custom class. This is used

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

@@ -19,7 +19,7 @@
 import androidx.annotation.NonNull;
 
 /** A corner treatment which cuts or clips the original corner of a shape with a straight line. */
-public class CutCornerTreatment extends CornerTreatment implements Cloneable {
+public class CutCornerTreatment extends CornerTreatment {
 
   /**
    * Instantiates a cut corner treatment of a given size. A cut corner treatment introduces two new

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

@@ -19,7 +19,7 @@
 import androidx.annotation.NonNull;
 
 /** A corner treatment which rounds a corner of a shape. */
-public class RoundedCornerTreatment extends CornerTreatment implements Cloneable {
+public class RoundedCornerTreatment extends CornerTreatment {
 
   /**
    * Instantiates a rounded corner treatment.