fix android import regression

Author: geof90

android/app/src/main/java/com/microsoft/codepush/react/CodePushNativeModule.java

@@ -1,6 +1,7 @@
 package com.microsoft.codepush.react;
 
 import android.app.Activity;
+import android.content.Context;
 import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Looper;
@@ -10,7 +11,6 @@
 import com.facebook.react.ReactActivity;
 import com.facebook.react.ReactInstanceManager;
 import com.facebook.react.bridge.Arguments;
-import com.facebook.react.bridge.JSBundleLoader;
 import com.facebook.react.bridge.LifecycleEventListener;
 import com.facebook.react.bridge.Promise;
 import com.facebook.react.bridge.ReactApplicationContext;