set max_events_per_sec to 55

reduce touch lag.
no Dispatcher fix w/throttle at 60: 75.9ms (range is 71.4ms - 80.1ms)
InputDispatcher fix w/throttle at 60: 49.0ms (range is 38.1ms - 66.7ms)
InputDispatcher fix w/throttle at 55: 41.2ms (range is 28.6ms - 66.7ms)

Change-Id: I76c0ba83abcd6a3d408a29ec76997a2e07e48a70
Signed-off-by: makarand.karvekar <makarand.karvekar@motorola.com>

services/java/com/android/server/wm/InputManager.java

@@ -549,7 +549,7 @@ public class InputManager {
             } catch (NumberFormatException e) {
             }
             if (result < 1) {
-                result = 60;
+                result = 55;
             }
             return result;
         }