Changes Action Logger to give epoch time

Log time changed to produce epoch time in milli seconds.
Nano to milli second conversion done in uxperf result
processor is removed.

Tested on Mate8 and time obtained is verified.

wlauto/external/uiauto/src/com/arm/wlauto/uiauto/BaseUiAutomation.java

@@ -89,13 +89,13 @@ public class BaseUiAutomation extends UiAutomatorTestCase {
 
         public void start() {
             if (enabled) {
-                Log.d("UX_PERF", testTag + "_start " + System.nanoTime());
+                Log.d("UX_PERF", testTag + "_start " + System.currentTimeMillis());
             }
         }
 
         public void stop() throws Exception {
             if (enabled) {
-                Log.d("UX_PERF", testTag + "_end " + System.nanoTime());
+                Log.d("UX_PERF", testTag + "_end " + System.currentTimeMillis());
             }
         }
     }
@@ -228,6 +228,7 @@ public class BaseUiAutomation extends UiAutomatorTestCase {
         UiDevice.getInstance().pressEnter();
     }
 
+
     public void pressBack() {
         UiDevice.getInstance().pressBack();
     }

wlauto/result_processors/uxperf.py

@@ -185,7 +185,7 @@ class UxPerfParser(object):
         for action, timestamps in self.actions.iteritems():
             # nanosecond precision, but not necessarily nanosecond resolution
             # truncate to guarantee millisecond precision
-            ts_ms = tuple(int(ts[:-6]) for ts in timestamps)
+            ts_ms = tuple(int(ts) for ts in timestamps)
             if len(ts_ms) == 2:
                 start, finish = ts_ms
                 duration = finish - start