Add uploader to change screen if different from change owner

Unlike owner, this widget is not a link, because we have no
corresponding 'uploader:' search operator, and going to a search for
'owner:<uploader>' may be confusing because the change you just came
from is not in the result list.

Change-Id: I0752b045d99945d7be0c3f0536d958fa7c5bbd98

gerrit-gwtui-common/src/main/java/com/google/gerrit/client/info/ChangeInfo.java

@@ -296,6 +296,7 @@ public class ChangeInfo extends JavaScriptObject {
     public final native int _number() /*-{ return this._number; }-*/;
     public final native String name() /*-{ return this.name; }-*/;
     public final native boolean draft() /*-{ return this.draft || false; }-*/;
+    public final native AccountInfo uploader() /*-{ return this.uploader; }-*/;
     public final native boolean isEdit() /*-{ return this._number == 0; }-*/;
     public final native CommitInfo commit() /*-{ return this.commit; }-*/;
     public final native void setCommit(CommitInfo c) /*-{ this.commit = c; }-*/;