fix: Use DisplayManager instead of context.display for refresh rate

On Android 11+ (API 30), calling context.display on applicationContext
throws UnsupportedOperationException because application context is not
a "visual context". Use DisplayManager.getDisplay(DEFAULT_DISPLAY)
instead, which works with any context type.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: oschwald

device-sdk/src/main/java/com/maxmind/device/collector/DeviceDataCollector.kt

@@ -3,10 +3,12 @@ package com.maxmind.device.collector
 import android.app.ActivityManager
 import android.content.Context
 import android.content.pm.PackageManager
+import android.hardware.display.DisplayManager
 import android.os.Build
 import android.os.Environment
 import android.os.StatFs
 import android.util.DisplayMetrics
+import android.view.Display
 import android.view.WindowManager
 import com.maxmind.device.model.BuildInfo
 import com.maxmind.device.model.DeviceData
@@ -52,8 +54,8 @@ internal class DeviceDataCollector(
      *
      * @return [DeviceData] containing collected device information
      */
-    fun collect(): DeviceData {
-        return DeviceData(
+    fun collect(): DeviceData =
+        DeviceData(
             storedID = storedIDCollector?.collect() ?: StoredID(),
             deviceIDs = deviceIDsCollector.collect(),
             build = collectBuildInfo(),
@@ -77,10 +79,9 @@ internal class DeviceDataCollector(
             deviceTime = System.currentTimeMillis(),
             webViewUserAgent = webViewCollector.collectUserAgent(),
         )
-    }
 
-    private fun collectBuildInfo(): BuildInfo {
-        return BuildInfo(
+    private fun collectBuildInfo(): BuildInfo =
+        BuildInfo(
             fingerprint = Build.FINGERPRINT,
             manufacturer = Build.MANUFACTURER,
             model = Build.MODEL,
@@ -95,7 +96,6 @@ internal class DeviceDataCollector(
             securityPatch = Build.VERSION.SECURITY_PATCH,
             supportedAbis = Build.SUPPORTED_ABIS.toList(),
         )
-    }
 
     private fun collectDisplayInfo(): DisplayInfo {
         val windowManager = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
@@ -106,7 +106,8 @@ internal class DeviceDataCollector(
 
         val refreshRate =
             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
-                context.display?.refreshRate
+                val displayManager = context.getSystemService(Context.DISPLAY_SERVICE) as DisplayManager
+                displayManager.getDisplay(Display.DEFAULT_DISPLAY)?.refreshRate
             } else {
                 @Suppress("DEPRECATION")
                 windowManager.defaultDisplay.refreshRate