Hard code a DPR of 2.0 in ozone on fnl

services/native_viewport/ozone/platform_viewport_ozone.cc

diff --git a/services/native_viewport/ozone/platform_viewport_ozone.cc b/services/native_viewport/ozone/platform_viewport_ozone.cc
index 4f23479..b15a67d 100644
--- a/services/native_viewport/ozone/platform_viewport_ozone.cc
+++ b/services/native_viewport/ozone/platform_viewport_ozone.cc
@@ -51,6 +51,9 @@
         ui::OzonePlatform::GetInstance()->CreatePlatformWindow(this, bounds);
 
     metrics_ = mojo::ViewportMetrics::New();
+#if defined(FNL_MUSL)
+    metrics_->device_pixel_ratio = 2.0;
+#endif
     metrics_->size = mojo::Size::From(platform_window_->GetBounds().size());
   }