Move Java Blimp shell code to app subpackage

blimp/client/app/android/javatests/src/org/chromium/blimp/app/BlimpNativeInstrumentationTestCase.java

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-package org.chromium.blimp;
+package org.chromium.blimp.app;
 
 import android.test.InstrumentationTestCase;
 
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.library_loader.ProcessInitException;
 
 import java.util.concurrent.Semaphore;
 
 /**
  * Base class for loading native library in tests. The setUp() methods must be invoked, and
@@ skipping 27 matching lines @@
      * Blocks until the native library startup is complete. If the startup dit not complete
      * successfully, this method throws a RuntimeException, otherwise it does nothing.
      * This method should be called in the start of any test method that requires native to be
      * successfully loaded.
      */
     protected final void waitUntilNativeIsReady() throws InterruptedException {
         mNativeReadySemaphore.acquire();
         if (!mSuccess) throw new RuntimeException("Native startup failed");
     }
 }