Fix Android `get_screen_orientation()` not returning valid values

platform/android/java/lib/src/org/godotengine/godot/GodotIO.java

@@ -285,10 +285,37 @@ public class GodotIO {
 				activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_USER);
 			} break;
 		}
-	};
+	}
 
 	public int getScreenOrientation() {
-		return activity.getRequestedOrientation();
+		int orientation = activity.getRequestedOrientation();
+		switch (orientation) {
+			case ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE:
+				return SCREEN_LANDSCAPE;
+			case ActivityInfo.SCREEN_ORIENTATION_PORTRAIT:
+				return SCREEN_PORTRAIT;
+			case ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE:
+				return SCREEN_REVERSE_LANDSCAPE;
+			case ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT:
+				return SCREEN_REVERSE_PORTRAIT;
+			case ActivityInfo.SCREEN_ORIENTATION_SENSOR_LANDSCAPE:
+			case ActivityInfo.SCREEN_ORIENTATION_USER_LANDSCAPE:
+				return SCREEN_SENSOR_LANDSCAPE;
+			case ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT:
+			case ActivityInfo.SCREEN_ORIENTATION_USER_PORTRAIT:
+				return SCREEN_SENSOR_PORTRAIT;
+			case ActivityInfo.SCREEN_ORIENTATION_SENSOR:
+			case ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR:
+			case ActivityInfo.SCREEN_ORIENTATION_FULL_USER:
+				return SCREEN_SENSOR;
+			case ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED:
+			case ActivityInfo.SCREEN_ORIENTATION_USER:
+			case ActivityInfo.SCREEN_ORIENTATION_BEHIND:
+			case ActivityInfo.SCREEN_ORIENTATION_NOSENSOR:
+			case ActivityInfo.SCREEN_ORIENTATION_LOCKED:
+			default:
+				return -1;
+		}
 	}
 
 	public void setEdit(GodotEditText _edit) {

platform/android/os_android.cpp

@@ -469,6 +469,7 @@ void OS_Android::set_screen_orientation(ScreenOrientation p_orientation) {
 
 OS::ScreenOrientation OS_Android::get_screen_orientation() const {
 	const int orientation = godot_io_java->get_screen_orientation();
+	ERR_FAIL_INDEX_V_MSG(orientation, 7, OS::ScreenOrientation(0), "Unrecognized screen orientation.");
 	return OS::ScreenOrientation(orientation);
 }