Increase granularity of gesture dispatch to 60fps

This is essential if AccessibilityService instances want to animate the
gestures being dispatched (e.g., displaying an overlay showing where the
virtual "finger" is moving).

Test: manual
Bug: 149753602
Change-Id: Ic508c6bd8b4cefa052be9adcac749859c382147a
diff --git a/core/java/android/accessibilityservice/AccessibilityService.java b/core/java/android/accessibilityservice/AccessibilityService.java
index b7a35f7..ef0b508 100644
--- a/core/java/android/accessibilityservice/AccessibilityService.java
+++ b/core/java/android/accessibilityservice/AccessibilityService.java
@@ -960,7 +960,7 @@
             return false;
         }
         List<GestureDescription.GestureStep> steps =
-                MotionEventGenerator.getGestureStepsFromGestureDescription(gesture, 100);
+                MotionEventGenerator.getGestureStepsFromGestureDescription(gesture, 16);
         try {
             synchronized (mLock) {
                 mGestureStatusCallbackSequence++;