Read later: Announce checked state in bookmark UI.

Uses Android's accessibility API to announce checked state when tapping
on an item when the selection mode is enabled.

Bug: 1166721
Change-Id: Ifeb2a9ffa80b9a6eecfe1d639a47f4338972aff3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2639155Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#845327}

components/browser_ui/widget/android/java/src/org/chromium/components/browser_ui/widget/selectable_list/SelectableItemViewBase.java

@@ -11,6 +11,7 @@ import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.View.OnLongClickListener;
 import android.view.View.OnTouchListener;
+import android.view.accessibility.AccessibilityNodeInfo;
 import android.widget.Checkable;
 
 import androidx.annotation.Nullable;
@@ -110,6 +111,19 @@ public abstract class SelectableItemViewBase<E> extends ViewLookupCachingFrameLa
         setOnTouchListener(this);
         setOnClickListener(this);
         setOnLongClickListener(this);
+        setAccessibilityDelegate(new AccessibilityDelegate() {
+            @Override
+            public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
+                super.onInitializeAccessibilityNodeInfo(host, info);
+
+                // Announce checked state if selection mode is on. The actual read out from talkback
+                // is "checked/unchecked, {content description of this view.}"
+                boolean checkable = mSelectionDelegate != null
+                        && mSelectionDelegate.isSelectionEnabled() && mItem != null;
+                info.setCheckable(checkable);
+                info.setChecked(isChecked());
+            }
+        });
     }
 
     @Override