[WebView] Reorganize all of the WebView Shell apks into their own dir.

android_webview/tools/WebViewShell/src/org/chromium/webview_shell/PageCyclerTestActivity.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.webview_shell;
-
-import android.app.Activity;
-import android.os.Bundle;
-import android.webkit.WebView;
-
-/**
- * This activity is used for loading urls using webview on Appurify bots to make sure the
- * webview doesn't crash.
- */
-public class PageCyclerTestActivity extends Activity {
-
-    private WebView mWebView;
-
-    @Override
-    public void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_webview);
-        mWebView = (WebView) findViewById(R.id.webview);
-    }
-
-    public WebView getWebView() {
-        return mWebView;
-    }
-}