Fix color for disabled button in voice call.

Bug: 79878432
Test: manual
PiperOrigin-RevId: 201763780
Change-Id: I3ea0fb46c3904060927b68417699708d2e62b08a
diff --git a/java/com/android/incallui/incall/impl/CheckableLabeledButton.java b/java/com/android/incallui/incall/impl/CheckableLabeledButton.java
index 4e8fa82..d4aba4c 100644
--- a/java/com/android/incallui/incall/impl/CheckableLabeledButton.java
+++ b/java/com/android/incallui/incall/impl/CheckableLabeledButton.java
@@ -39,7 +39,6 @@
 public class CheckableLabeledButton extends LinearLayout implements Checkable {
 
   private static final int[] CHECKED_STATE_SET = {android.R.attr.state_checked};
-  private static final float DISABLED_STATE_OPACITY = .3f;
   private boolean broadcasting;
   private boolean isChecked;
   private OnCheckedChangeListener onCheckedChangeListener;
@@ -124,13 +123,6 @@
     setOutlineProvider(null);
   }
 
-  @Override
-  public void refreshDrawableState() {
-    super.refreshDrawableState();
-    iconView.setAlpha(isEnabled() ? 1f : DISABLED_STATE_OPACITY);
-    labelView.setAlpha(isEnabled() ? 1f : DISABLED_STATE_OPACITY);
-  }
-
   public Drawable getIconDrawable() {
     return iconView.getDrawable();
   }