Stub out UpdateChecker

app/src/main/java/i2p/bote/service/UpdateChecker.java

@@ -0,0 +1,19 @@
+package i2p.bote.service;
+
+import net.i2p.util.I2PAppThread;
+
+import i2p.bote.Configuration;
+import i2p.bote.network.NetworkStatusSource;
+
+public class UpdateChecker extends I2PAppThread {
+    public UpdateChecker(NetworkStatusSource networkStatusSource, Configuration configuration) {
+        super("UpdateCheckr");
+    }
+
+    public synchronized boolean isUpdateAvailable() {
+        return false;
+    }
+
+    @Override
+    public void run() {}
+}