[Android] Enable multidex for debug builds of ChromePublic.

base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java

Index: base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java
diff --git a/base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java b/base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java
index ad5cdd815bfcf81fe85952085f4f1656b04f185a..1cd2acfb55beb557f72bc307f5ce912d9c41e4e9 100644
--- a/base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java
+++ b/base/android/java/src/org/chromium/base/AnimationFrameTimeHistogram.java
@@ -11,10 +11,13 @@ import android.animation.TimeAnimator;
 import android.animation.TimeAnimator.TimeListener;
 import android.util.Log;
 
+import org.chromium.base.annotations.MainDex;
+
 /**
  * Record Android animation frame rate and save it to UMA histogram. This is mainly for monitoring
  * any jankiness of short Chrome Android animations. It is limited to few seconds of recording.
  */
+@MainDex
 public class AnimationFrameTimeHistogram {
     private static final String TAG = "AnimationFrameTimeHistogram";
     private static final int MAX_FRAME_TIME_NUM = 600; // 10 sec on 60 fps.