[Tizen] Fixed getting the device type (#12133)

Author: rookiejava

Xamarin.Forms.Platform.Tizen/Forms.cs

@@ -104,7 +104,27 @@ public static class Forms
 
 		static Lazy<string> s_deviceType = new Lazy<string>(() =>
 		{
-			TSystemInfo.TryGetValue("http://tizen.org/system/device_type", out string deviceType);
+			if (!TSystemInfo.TryGetValue("http://tizen.org/system/device_type", out string deviceType))
+			{
+				// Since, above key("http://tizen.org/system/device_type") is not available on Tizen 4.0, we uses profile to decide the type of device on 4.0.
+				var profile = GetProfile();
+				if (profile == "mobile")
+				{
+					deviceType = "Mobile";
+				}
+				else if (profile == "tv")
+				{
+					deviceType = "TV";
+				}
+				else if (profile == "wearable")
+				{
+					deviceType = "Wearable";
+				}
+				else
+				{
+					deviceType = "Unknown";
+				}
+			}
 			return deviceType;
 		});