Make all member variables in DownloadNotificationService final

chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java

Index: chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java
index ac752239432a06e46d5bf4356962328a96b7180f..4ae33fa10e6e297f48d72a9665e60ade0786d4e2 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/download/DownloadSharedPreferenceEntry.java
@@ -27,13 +27,13 @@ public class DownloadSharedPreferenceEntry {
 
     public final int notificationId;
     public final boolean isOffTheRecord;  // Whether the download is public (non incognito).
-    public boolean canDownloadWhileMetered;
+    public final boolean canDownloadWhileMetered;
     public final String fileName;
     public final String downloadGuid;
     public final int itemType;
     // This can only be false for paused downloads. For downloads that are pending or in progress,
     // isAutoResumable should always be true.
-    public boolean isAutoResumable;
+    public final boolean isAutoResumable;
 
     static final DownloadSharedPreferenceEntry INVALID_ENTRY =
             new DownloadSharedPreferenceEntry(-1, false, false, null, "", ITEM_TYPE_DOWNLOAD,