[Android] Fix OnIdiom threading issue by removing using statements in DeviceInfo (#30288)

* Initial plan

* Fix OnIdiom threading issue by removing using statements in DeviceInfo.android.cs

Co-authored-by: PureWeen <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: PureWeen <[email protected]>

Author: Copilot

src/Essentials/src/DeviceInfo/DeviceInfo.android.cs

@@ -41,7 +41,7 @@ public DeviceIdiom Idiom
 				var currentIdiom = DeviceIdiom.Unknown;
 
 				// first try UIModeManager
-				using var uiModeManager = UiModeManager.FromContext(Application.Context);
+				var uiModeManager = UiModeManager.FromContext(Application.Context);
 
 				try
 				{
@@ -66,7 +66,7 @@ public DeviceIdiom Idiom
 					else
 					{
 						// start clutching at straws
-						using var metrics = Application.Context.Resources?.DisplayMetrics;
+						var metrics = Application.Context.Resources?.DisplayMetrics;
 						if (metrics != null)
 						{
 							var minSize = Math.Min(metrics.WidthPixels, metrics.HeightPixels);