Use internationalized string for accessibility link label

- Added accessibility_link_action string resource
- Updated LinkAccessibilityDelegate to accept Context and use resource
- Updated ConversationItem to pass context to delegate

Co-authored-by: adbenitez <24558636+adbenitez@users.noreply.github.com>

src/main/java/org/thoughtcrime/securesms/ConversationItem.java

@@ -432,7 +432,7 @@ public class ConversationItem extends BaseConversationItem
       
       // Set accessibility delegate for TalkBack to expose links as custom actions
       if (Util.isTouchExplorationEnabled(context) && batchSelected.isEmpty()) {
-        bodyText.setAccessibilityDelegate(new LinkAccessibilityDelegate());
+        bodyText.setAccessibilityDelegate(new LinkAccessibilityDelegate(context));
       } else {
         bodyText.setAccessibilityDelegate(null);
       }

src/main/java/org/thoughtcrime/securesms/util/LinkAccessibilityDelegate.java

@@ -1,5 +1,6 @@
 package org.thoughtcrime.securesms.util;
 
+import android.content.Context;
 import android.os.Bundle;
 import android.text.Spanned;
 import android.view.View;
@@ -8,6 +9,8 @@ import android.widget.TextView;
 
 import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
 
+import org.thoughtcrime.securesms.R;
+
 import java.util.HashMap;
 import java.util.Map;
 
@@ -22,6 +25,12 @@ public class LinkAccessibilityDelegate extends View.AccessibilityDelegate {
   
   // Map to store span references for each action ID
   private final Map<Integer, LongClickCopySpan> actionSpanMap = new HashMap<>();
+  
+  private final Context context;
+  
+  public LinkAccessibilityDelegate(Context context) {
+    this.context = context;
+  }
 
   @Override
   public void onInitializeAccessibilityNodeInfo(View host, AccessibilityNodeInfo info) {
@@ -52,7 +61,7 @@ public class LinkAccessibilityDelegate extends View.AccessibilityDelegate {
       
       if (start >= 0 && end > start && end <= spanned.length()) {
         String linkText = spanned.subSequence(start, end).toString();
-        String label = "Open link: " + linkText;
+        String label = context.getString(R.string.accessibility_link_action, linkText);
         
         // Create a unique action ID for each link
         final int actionId = LINK_ACTION_BASE_ID + i;