[Slider] Fix lint error caused by hidden super interface

Overriding the inherited methods from a hidden super interface to fix lint errors caused by those methods being hidden.

Resolves #2493

PiperOrigin-RevId: 421909180

Author: drchen

lib/java/com/google/android/material/slider/RangeSlider.java

@@ -82,10 +82,19 @@ public RangeSlider(@NonNull Context context, @Nullable AttributeSet attrs, int d
    *
    * To check all the current values, use {@see RangeSlider#getValues()}.
    */
-  public interface OnChangeListener extends BaseOnChangeListener<RangeSlider> {}
+  public interface OnChangeListener extends BaseOnChangeListener<RangeSlider> {
+    @Override
+    void onValueChange(@NonNull RangeSlider slider, float value, boolean fromUser);
+  }
 
   /** Interface definition for a callback invoked when a slider's value is changed. */
-  public interface OnSliderTouchListener extends BaseOnSliderTouchListener<RangeSlider> {}
+  public interface OnSliderTouchListener extends BaseOnSliderTouchListener<RangeSlider> {
+    @Override
+    void onStartTrackingTouch(@NonNull RangeSlider slider);
+
+    @Override
+    void onStopTrackingTouch(@NonNull RangeSlider slider);
+  }
 
   /**
    * {@inheritDoc}

lib/java/com/google/android/material/slider/Slider.java

@@ -40,13 +40,22 @@
 public class Slider extends BaseSlider<Slider, OnChangeListener, OnSliderTouchListener> {
 
   /** Interface definition for a callback invoked when a slider's value is changed. */
-  public interface OnChangeListener extends BaseOnChangeListener<Slider> {}
+  public interface OnChangeListener extends BaseOnChangeListener<Slider> {
+    @Override
+    void onValueChange(@NonNull Slider slider, float value, boolean fromUser);
+  }
 
   /**
    * Interface definition for callbacks invoked when a slider's touch event is being
    * started/stopped.
    */
-  public interface OnSliderTouchListener extends BaseOnSliderTouchListener<Slider> {}
+  public interface OnSliderTouchListener extends BaseOnSliderTouchListener<Slider> {
+    @Override
+    void onStartTrackingTouch(@NonNull Slider slider);
+
+    @Override
+    void onStopTrackingTouch(@NonNull Slider slider);
+  }
 
   public Slider(@NonNull Context context) {
     this(context, null);