Sync: Polish notification title on Android N+.

Starts from Android N, notification by default has the app name, so the
title should not be same as the app name. The title can be "Sync", and
the text can be updated from "Sync: {sync message}" to "{sync message}".

Bug: 875906
Change-Id: Ifee2bca85305ad9ae62b6122bec9bbf83d59f026
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1829740Reviewed-by: Tommy Nyquist <nyquist@chromium.org>
Reviewed-by: Peter Beverloo <peter@chromium.org>
Commit-Queue: Xing Liu <xingliu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#701227}

chrome/android/java/src/org/chromium/chrome/browser/sync/SyncNotificationController.java

@@ -6,6 +6,7 @@ package org.chromium.chrome.browser.sync;
 
 import android.content.Context;
 import android.content.Intent;
+import android.os.Build;
 import android.util.Log;
 
 import org.chromium.base.ContextUtils;
@@ -90,9 +91,17 @@ public class SyncNotificationController implements ProfileSyncService.SyncStateC
      */
     private void showSyncNotification(int message, Intent intent) {
         Context applicationContext = ContextUtils.getApplicationContext();
-        String title = applicationContext.getString(R.string.app_name);
-        String text = applicationContext.getString(R.string.sign_in_sync) + ": "
-                + applicationContext.getString(message);
+        String title = null, text = null;
+        // From Android N, notification by default has the app name and title should not be the same
+        // as app name.
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            title = applicationContext.getString(R.string.sign_in_sync);
+            text = applicationContext.getString(message);
+        } else {
+            title = applicationContext.getString(R.string.app_name);
+            text = applicationContext.getString(R.string.sign_in_sync) + ": "
+                    + applicationContext.getString(message);
+        }
 
         PendingIntentProvider contentIntent =
                 PendingIntentProvider.getActivity(applicationContext, 0, intent, 0);