Mirgrate references to androidx.

Bug: 1052460
Change-Id: I1d026d1ded59304050451d175c1a97909ee8cc26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2070828Reviewed-by: Joe Downing <joedow@chromium.org>
Commit-Queue: Joe Downing <joedow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744276}

remoting/android/java/res/layout/credits.xml

@@ -9,7 +9,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
-    <android.support.v7.widget.Toolbar
+    <androidx.appcompat.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"

remoting/android/java/res/layout/desktop.xml

@@ -16,7 +16,7 @@
         android:layout_height="match_parent"
         android:fitsSystemWindows="true"
         android:elevation="4dp">
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:alpha="0.85"
             android:layout_width="match_parent"

remoting/android/java/res/layout/help.xml

@@ -9,7 +9,7 @@
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical">
-    <android.support.v7.widget.Toolbar
+    <androidx.appcompat.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"

remoting/android/java/res/layout/main.xml

@@ -5,7 +5,7 @@
      found in the LICENSE file.
 -->
 
-<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.drawerlayout.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@+id/drawer_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
@@ -15,7 +15,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical">
-        <android.support.v7.widget.Toolbar
+        <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -81,4 +81,4 @@
         android:background="@android:color/background_light"
         android:fitsSystemWindows="true">
     </LinearLayout>
-</android.support.v4.widget.DrawerLayout>
+</androidx.drawerlayout.widget.DrawerLayout>