Update resources to androidx.

Bug: 896775
Change-Id: Ia8b56274328b16b1255038c05bd49cba94c97471
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2144817Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Commit-Queue: benjamin joyce <bjoyce@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758026}

android_webview/tools/system_webview_shell/apk/res/layout/activity_webview_browser.xml

@@ -12,7 +12,7 @@
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:gravity="center">
-    <android.support.v7.widget.Toolbar
+    <androidx.appcompat.widget.Toolbar
          android:id="@+id/browser_toolbar"
          android:layout_width="match_parent"
          android:layout_height="?attr/actionBarSize"

chrome/android/features/media_router/java/res/layout/caf_controller_media_route_button.xml

@@ -3,7 +3,7 @@
      Use of this source code is governed by a BSD-style license that can be
      found in the LICENSE file.
 -->
-<android.support.v7.app.MediaRouteButton
+<androidx.appcompat.app.MediaRouteButton
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/cast_controller_media_route_button"
     android:layout_width="wrap_content"

components/page_info/android/java/res/layout/cookie_controls_view.xml

@@ -46,7 +46,7 @@
                 android:textAppearance="@style/TextAppearance.TextMedium.Secondary" />
         </LinearLayout>
 
-        <android.support.v7.widget.SwitchCompat
+        <androidx.appcompat.widget.SwitchCompat
             android:id="@+id/cookie_controls_block_cookies_switch"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"