Convert tool type to enum class

For better type safety, use enum class when sending tool type.

Bug: 198472780
Test: atest libinput_tests inputflinger_tests
Change-Id: I371f08087b9513b6f75966c124de77bc12f8324e
diff --git a/libs/input/tests/VelocityTracker_test.cpp b/libs/input/tests/VelocityTracker_test.cpp
index 2a424af..ffebff1 100644
--- a/libs/input/tests/VelocityTracker_test.cpp
+++ b/libs/input/tests/VelocityTracker_test.cpp
@@ -208,7 +208,7 @@
             coords[pointerIndex].isResampled = position.isResampled;
 
             properties[pointerIndex].id = pointerId;
-            properties[pointerIndex].toolType = AMOTION_EVENT_TOOL_TYPE_FINGER;
+            properties[pointerIndex].toolType = ToolType::FINGER;
             pointerIndex++;
         }
         EXPECT_EQ(pointerIndex, pointerCount);