[ui] IJPL-250013 Promote RoundedIcon to stable

(cherry picked from commit b3bfd7a6e0d9cfea543bd822e5cf10414cf68292)

IJ-CR-213229

GitOrigin-RevId: 5e9520bc9656de53da643e5fd34ff2f6f902be2a

platform/core-ui/api-dump-experimental.txt

@@ -1,18 +1,3 @@
-*f:com.intellij.ui.RoundedIcon
-- com.intellij.util.ui.JBScalableIcon
-- com.intellij.ui.icons.DarkIconProvider
-- com.intellij.ui.icons.IconWithToolTip
-- <init>(java.awt.Image,D):V
-- <init>(java.awt.Image,D,Z):V
-- <init>(javax.swing.Icon,D):V
-- <init>(javax.swing.Icon,D,Z):V
-- equals(java.lang.Object):Z
-- getDarkIcon(Z):javax.swing.Icon
-- getIconHeight():I
-- getIconWidth():I
-- getToolTip(Z):java.lang.String
-- hashCode():I
-- paintIcon(java.awt.Component,java.awt.Graphics,I,I):V
 f:com.intellij.ui.SimpleTextAttributes
 - *s:fromMarkupTextKind(com.intellij.openapi.util.text.MarkupText$Kind):com.intellij.ui.SimpleTextAttributes
 f:com.intellij.util.IconUtil

platform/core-ui/api-dump.txt

@@ -297,6 +297,21 @@ f:com.intellij.ui.OverlaidOffsetIconsIcon
 f:com.intellij.ui.RightAlignedLabelUI
 - javax.swing.plaf.basic.BasicLabelUI
 - <init>():V
+f:com.intellij.ui.RoundedIcon
+- com.intellij.util.ui.JBScalableIcon
+- com.intellij.ui.icons.DarkIconProvider
+- com.intellij.ui.icons.IconWithToolTip
+- <init>(java.awt.Image,D):V
+- <init>(java.awt.Image,D,Z):V
+- <init>(javax.swing.Icon,D):V
+- <init>(javax.swing.Icon,D,Z):V
+- equals(java.lang.Object):Z
+- getDarkIcon(Z):javax.swing.Icon
+- getIconHeight():I
+- getIconWidth():I
+- getToolTip(Z):java.lang.String
+- hashCode():I
+- paintIcon(java.awt.Component,java.awt.Graphics,I,I):V
 c:com.intellij.ui.RowIcon
 - com.intellij.util.ui.JBCachingScalableIcon
 - com.intellij.ui.icons.IconWithToolTip

platform/core-ui/src/ui/RoundedIcon.java

@@ -10,7 +10,6 @@ import com.intellij.util.ObjectUtils;
 import com.intellij.util.ui.ImageUtil;
 import com.intellij.util.ui.JBScalableIcon;
 import com.intellij.util.ui.JBUI;
-import org.jetbrains.annotations.ApiStatus;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -32,7 +31,6 @@ import java.awt.geom.RoundRectangle2D;
 import java.awt.image.BufferedImage;
 import java.util.Objects;
 
-@ApiStatus.Experimental
 public final class RoundedIcon extends JBScalableIcon implements DarkIconProvider, IconWithToolTip {
   private final Icon mySourceIcon;
   private final double myArcRatio;
@@ -158,7 +156,6 @@ public final class RoundedIcon extends JBScalableIcon implements DarkIconProvide
     return mySourceIcon.getIconHeight();
   }
 
-
   @Override
   public int hashCode() {
     return Objects.hash(mySourceIcon, myArcRatio);