Add copy constructors to Update and UpdateDownload

src/org/lineageos/updater/Update.java

@@ -27,6 +27,15 @@ public class Update implements Comparable<Update> {
     public Update() {
     }
 
+    public Update(Update update) {
+        mName = update.getName();
+        mDownloadUrl = update.getDownloadUrl();
+        mDownloadId = update.getDownloadId();
+        mTimestamp = update.getTimestamp();
+        mType = update.getType();
+        mVersion = update.getVersion();
+    }
+
     public String getName() {
         return mName;
     }

src/org/lineageos/updater/UpdateDownload.java

@@ -29,6 +29,26 @@ public class UpdateDownload extends Update {
     private int mInstallProgress;
     private boolean mAvailableOnline;
 
+    public UpdateDownload() {
+    }
+
+    public UpdateDownload(Update update) {
+        super(update);
+    }
+
+    public UpdateDownload(UpdateDownload update) {
+        super(update);
+        mStatus = update.getStatus();
+        mPersistentStatus = update.getPersistentStatus();
+        mFile = update.getFile();
+        mFileSize = update.getFileSize();
+        mProgress = update.getProgress();
+        mEta = update.getEta();
+        mSpeed = update.getSpeed();
+        mInstallProgress = update.getInstallProgress();
+        mAvailableOnline = update.getAvailableOnline();
+    }
+
     public UpdateStatus getStatus() {
         return mStatus;
     }