Fix test

Author: ColdPaleLight

testing/scenario_app/android/app/src/androidTest/java/dev/flutter/scenariosui/GetBitmapTests.java

@@ -33,6 +33,6 @@ public void getBitmap() throws Exception {
     Bitmap bitmap = activity.getBitmap();
 
     assertEquals(bitmap.getPixel(10, 10), 0xFFFF0000);
-    assertEquals(bitmap.getPixel(10, 210), 0xFF0000FF);
+    assertEquals(bitmap.getPixel(10, bitmap.getHeight() - 10), 0xFF0000FF);
   }
 }

testing/scenario_app/lib/src/get_bitmap_scenario.dart

@@ -18,10 +18,12 @@ class GetBitmapScenario extends Scenario {
   void onBeginFrame(Duration duration) {
     final PictureRecorder recorder = PictureRecorder();
     final Canvas canvas = Canvas(recorder);
-    canvas.scale(1.0 / window.devicePixelRatio);
-    canvas.drawRect(const Rect.fromLTWH(0, 0, 100, 100), Paint()..color = const Color(0xFFFF0000));
-    canvas.translate(0, 200);
-    canvas.drawRect(const Rect.fromLTWH(0, 0, 100, 100), Paint()..color = const Color(0xFF0000FF));
+    canvas.drawRect(Rect.fromLTWH(0, 0, window.physicalSize.width, 300),
+        Paint()..color = const Color(0xFFFF0000));
+    canvas.drawRect(
+        Rect.fromLTWH(0, window.physicalSize.height - 300,
+            window.physicalSize.width, 300),
+        Paint()..color = const Color(0xFF0000FF));
     final Picture picture = recorder.endRecording();
     final SceneBuilder builder = SceneBuilder();
     builder.addPicture(Offset.zero, picture);