Make android_webview_test fit isolate naming convention.

android_webview/android_webview_test_apk_run.isolate

-# 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.
-{
-  'includes': [
-    '../build/android/android.isolate',
-  ],
-  'variables': {
-    'command': [
-      '<(PRODUCT_DIR)/bin/run_android_webview_test_apk',
-      '--enable-platform-mode',
-      '-e', 'local',
-      '--logcat-output-dir', '${ISOLATED_OUTDIR}/logcats',
-    ],
-    'files': [
-      '../third_party/proguard/lib/proguard.jar',
-      '<(PRODUCT_DIR)/host_forwarder',
-      '<(PRODUCT_DIR)/forwarder_dist/',
-      '<(PRODUCT_DIR)/android_webview_test_apk/',
-      '<(PRODUCT_DIR)/apks/AndroidWebView.apk',
-      '<(PRODUCT_DIR)/apks/AndroidWebViewTest.apk',
-      '<(PRODUCT_DIR)/bin/run_android_webview_test_apk',
-      '<(PRODUCT_DIR)/test.lib.java/AndroidWebViewTest.jar',
-      'android_webview_test_apk.isolate',
-      'test/data/',
-    ]
-  },
-}