[frame_stats] Show viewport resolution on the stats layer

Also set the stats layer toggle to be on by default until we add some UI
to toggle it on mobile.

examples/with_winit/src/lib.rs

@@ -99,7 +99,7 @@ fn run(
     let mut simple_text = SimpleText::new();
     let mut images = ImageCache::new();
     let mut stats = stats::Stats::new();
-    let mut stats_toggle = false;
+    let mut stats_toggle = true;
     let start = Instant::now();
 
     let mut touch_state = multi_touch::TouchState::new();

examples/with_winit/src/stats.rs

@@ -79,6 +79,14 @@ impl Snapshot {
             offset * Affine::translate((left_margin, 3. * text_height)),
             &format!("Frame Time (max): {:.2} ms", self.frame_time_max_ms),
         );
+        text.add(
+            sb,
+            None,
+            text_size,
+            Some(&Brush::Solid(Color::WHITE)),
+            offset * Affine::translate((left_margin, 4. * text_height)),
+            &format!("Resolution: {viewport_width}x{viewport_height}"),
+        );
         text.add(
             sb,
             None,