Set default offset to center of tile for arrows

Set default offset of the hint arrow to center of tile like type 2 of
the hint arrow does by default in runescape-client.

Signed-off-by: Tomas Slusny <slusnucky@gmail.com>

runescape-api/src/main/java/net/runelite/rs/api/RSClient.java

@@ -595,6 +595,12 @@ public interface RSClient extends RSGameEngine, Client
 	@Import("hintArrowY")
 	int getHintArrowY();
 
+	@Import("hintArrowOffsetX")
+	void setHintArrowOffsetX(int value);
+
+	@Import("hintArrowOffsetY")
+	void setHintArrowOffsetY(int value);
+
 	@Import("hintArrowNpcTargetIdx")
 	void setHintArrowNpcTargetIdx(int value);