Migrate to AndroidX framework

Change-Id: I55adcd7eb5c2713d9fd73b085ffc68e37e5e070f
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 6d8b08a..037aa3f 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.v4.widget.DrawerLayout
+<androidx.drawerlayout.widget.DrawerLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/drawer_layout"
@@ -23,4 +23,4 @@
         tools:layout="@layout/activity_main_drawer_listview"
         />
 
-</android.support.v4.widget.DrawerLayout>
+</androidx.drawerlayout.widget.DrawerLayout>