[scribe] Add index of handwriting icon on native

Add TYPE_HANDWRITING index on native input.h to use on
inputManagerService.cpp

Test: Manual Test(hover pointer on handwriting area)
Bug: b/215436642
Change-Id: I41caec44d81c414b4acc1e3575c5acc6f99146d8
diff --git a/include/input/Input.h b/include/input/Input.h
index 313090b..a369501 100644
--- a/include/input/Input.h
+++ b/include/input/Input.h
@@ -1127,6 +1127,7 @@
     TYPE_ZOOM_OUT = 1019,
     TYPE_GRAB = 1020,
     TYPE_GRABBING = 1021,
+    TYPE_HANDWRITING = 1022,
 
     TYPE_SPOT_HOVER = 2000,
     TYPE_SPOT_TOUCH = 2001,