Replace deprecated Android java test annotations

chrome/android/javatests/src/org/chromium/chrome/browser/ProcessIsolationTest.java

 // Copyright 2015 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.chrome.browser;
 
-import android.test.suitebuilder.annotation.MediumTest;
+import android.support.test.filters.MediumTest;
 import android.text.TextUtils;
 
 import org.chromium.base.BuildInfo;
 import org.chromium.base.test.util.DisableIf;
 import org.chromium.base.test.util.Feature;
 import org.chromium.base.test.util.RetryOnFailure;
 import org.chromium.chrome.test.ChromeActivityTestCaseBase;
 
 import java.io.BufferedReader;
 import java.io.IOException;
@@ skipping 95 matching lines @@
         assertEquals("Found at least two processes with the same UID in ps output: \n"
                 + sb.toString(),
                 uids.size(), new HashSet<String>(uids).size());
     }
 
     @Override
     public void startMainActivity() throws InterruptedException {
         startMainActivityFromLauncher();
     }
 }