VideoCapturerAndroid: Revert elapsedRealtimeNanos to elapsedRealtime

talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java

Index: talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java
diff --git a/talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java b/talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java
index 8976ad25b6abbc2a9cad018d2727bde0a7dd5891..d1e45701b3f7dc0da7835287e5c235a449e780d9 100644
--- a/talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java
+++ b/talk/app/webrtc/java/src/org/webrtc/VideoCapturerAndroid.java
@@ -805,7 +805,8 @@ public class VideoCapturerAndroid extends VideoCapturer implements PreviewCallba
       throw new RuntimeException("Unexpected camera in callback!");
     }
 
-    final long captureTimeNs = SystemClock.elapsedRealtimeNanos();
+    final long captureTimeNs =
+        TimeUnit.MILLISECONDS.toNanos(SystemClock.elapsedRealtime());
 
     captureBuffersCount += videoBuffers.numCaptureBuffersAvailable();
     int rotation = getDeviceOrientation();