feat(android): Add missing initialization of DisplayMetricsHolder

[skusnierz]

Summary:

https://app.asana.com/1/236888843494340/project/1211566197378916/task/1210654707296995

React Native has a parameter called PixelRatio (https://reactnative.dev/docs/pixelratio) which is responsible for scaling components and font size.

DisplayMetricsHolder.kt is responsible for storing values such as density, fontScale, width, and height.

private fun getPhysicalPixelsWritableMap(
      displayMetrics: DisplayMetrics,
      fontScale: Double
  ): WritableMap =
      WritableNativeMap().apply {
        putInt(“width”, displayMetrics.widthPixels)
        putInt(“height”, displayMetrics.heightPixels)
        putDouble(“scale”, displayMetrics.density.toDouble())
        putDouble(“fontScale”, fontScale)
        putDouble(“densityDpi”, displayMetrics.densityDpi.toDouble())
      }

While debugging why the Discord app scales font size and component sizes incorrectly, I noticed that PixelRatio values change incorrectly when changing the OS display size on Android:

Screen.Recording.2025-10-08.at.16.45.26.mov

This PR adds the missing DisplayMetricsHolder initialization on Android:

Screen.Recording.2025-10-08.at.16.49.40.mov

Test Plan:

Discord app :

Before :

Screen.Recording.2025-10-08.at.16.55.56.mov

After:

Screen.Recording.2025-10-08.at.16.59.39.mov

Changelog:

[joemun]

nice!