[BadgeDrawable][a11y] Attach/detach badge contentDescription when using menuItem.

Resolves #2429

PiperOrigin-RevId: 439651014
(cherry picked from commit ee49c5a)

Author: paulfthomas

lib/java/com/google/android/material/badge/BadgeUtils.java

@@ -33,6 +33,9 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
+import androidx.core.view.AccessibilityDelegateCompat;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 import com.google.android.material.internal.ParcelableSparseArray;
 import com.google.android.material.internal.ToolbarUtils;
 
@@ -96,7 +99,6 @@ public static void attachBadgeDrawable(
         anchor.getOverlay().add(badgeDrawable);
       }
     }
-
   }
 
   /**
@@ -131,11 +133,39 @@ public void run() {
             if (menuItemView != null) {
               setToolbarOffset(badgeDrawable, toolbar.getResources());
               BadgeUtils.attachBadgeDrawable(badgeDrawable, menuItemView, customBadgeParent);
+              attachBadgeContentDescription(badgeDrawable, menuItemView);
             }
           }
         });
   }
 
+  private static void attachBadgeContentDescription(
+      @NonNull final BadgeDrawable badgeDrawable, @NonNull View view) {
+    if (VERSION.SDK_INT >= VERSION_CODES.Q && ViewCompat.hasAccessibilityDelegate(view)) {
+      ViewCompat.setAccessibilityDelegate(
+          view,
+          new AccessibilityDelegateCompat(view.getAccessibilityDelegate()) {
+            @Override
+            public void onInitializeAccessibilityNodeInfo(
+                View host, AccessibilityNodeInfoCompat info) {
+              super.onInitializeAccessibilityNodeInfo(host, info);
+              info.setContentDescription(badgeDrawable.getContentDescription());
+            }
+          });
+    } else {
+      ViewCompat.setAccessibilityDelegate(
+          view,
+          new AccessibilityDelegateCompat() {
+            @Override
+            public void onInitializeAccessibilityNodeInfo(
+                View host, AccessibilityNodeInfoCompat info) {
+              super.onInitializeAccessibilityNodeInfo(host, info);
+              info.setContentDescription(badgeDrawable.getContentDescription());
+            }
+          });
+    }
+  }
+
   /**
    * Detaches a BadgeDrawable from its associated anchor. For API 18+, the BadgeDrawable will be
    * removed from its anchor's ViewOverlay. For pre-API 18, the BadgeDrawable will be removed from
@@ -167,11 +197,29 @@ public static void detachBadgeDrawable(
     if (menuItemView != null) {
       removeToolbarOffset(badgeDrawable);
       detachBadgeDrawable(badgeDrawable, menuItemView);
+      detachBadgeContentDescription(menuItemView);
     } else {
       Log.w(LOG_TAG, "Trying to remove badge from a null menuItemView: " + menuItemId);
     }
   }
 
+  private static void detachBadgeContentDescription(@NonNull View view) {
+    if (VERSION.SDK_INT >= VERSION_CODES.Q && ViewCompat.hasAccessibilityDelegate(view)) {
+      ViewCompat.setAccessibilityDelegate(
+          view,
+          new AccessibilityDelegateCompat(view.getAccessibilityDelegate()) {
+            @Override
+            public void onInitializeAccessibilityNodeInfo(
+                View host, AccessibilityNodeInfoCompat info) {
+              super.onInitializeAccessibilityNodeInfo(host, info);
+              info.setContentDescription(null);
+            }
+          });
+    } else {
+      ViewCompat.setAccessibilityDelegate(view, null);
+    }
+  }
+
   @VisibleForTesting
   static void setToolbarOffset(BadgeDrawable badgeDrawable, Resources resources) {
     badgeDrawable.setAdditionalHorizontalOffset(