Add unlocked icon for set password option.

Signed-off-by: Ivan Sein <ivan@nextcloud.com>

VideoCalls/Images.xcassets/no-password-settings.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "no-password-settings.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "no-password-settings@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "no-password-settings@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

VideoCalls/RoomInfoTableViewController.m

@@ -365,7 +365,7 @@ typedef enum PublicSection {
                     }
                     
                     cell.textLabel.text = (_room.hasPassword) ? @"Change password" : @"Set password";
-                    [cell.imageView setImage:[UIImage imageNamed:@"privacy"]];
+                    [cell.imageView setImage: (_room.hasPassword) ? [UIImage imageNamed:@"privacy"] : [UIImage imageNamed:@"no-password-settings"]];
                     
                     return cell;
                 }