Input logic cleanup:

- Fix invalid detection of mouse input. Prioritize using the event tool type to detect the type of the event, and only use the event source as fallback.

- Ensure that pressure and tilt information is passed for touch drag events

- Consolidate logic and remove redundant methods

- Improve the logic to detect when external hardware keyboards are connected to the device

platform/android/android_input_handler.h

@@ -42,6 +42,8 @@ public:
 	struct TouchPos {
 		int id = 0;
 		Point2 pos;
+		float pressure = 0;
+		Vector2 tilt;
 	};
 
 	struct MouseEventInfo {