Accessibility: toggle seen

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -7653,6 +7653,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                             context.getString(expanded ? R.string.title_accessibility_collapse : R.string.title_accessibility_expand)));
                 ibExpander.setImportantForAccessibility(View.IMPORTANT_FOR_ACCESSIBILITY_NO);
 
+                info.addAction(new AccessibilityNodeInfo.AccessibilityAction(R.id.ibSeen,
+                        context.getString(message.ui_seen ? R.string.title_unseen : R.string.title_seen)));
+
                 info.addAction(new AccessibilityNodeInfo.AccessibilityAction(R.id.ibAnswer,
                         context.getString(R.string.title_reply)));
 
@@ -7701,6 +7704,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                 if (action == R.id.ibExpander) {
                     onToggleMessage(message);
                     return true;
+                } else if (action == R.id.ibSeen) {
+                    onMenuUnseen(message);
+                    return true;
                 } else if (action == R.id.ibAnswer) {
                     onActionAnswer(message, view);
                     return true;