Migrating to android-x

Bug: 112610679
Change-Id: I89b6c4e7852c89f893de5ce091b94b6894649091
diff --git a/src/com/android/wallpaper/module/WallpaperPreferences.java b/src/com/android/wallpaper/module/WallpaperPreferences.java
index 2427f23..aa964cd 100755
--- a/src/com/android/wallpaper/module/WallpaperPreferences.java
+++ b/src/com/android/wallpaper/module/WallpaperPreferences.java
@@ -17,11 +17,12 @@
 
 import android.annotation.TargetApi;
 import android.os.Build;
-import android.support.annotation.IntDef;
-import android.support.annotation.Nullable;
 
 import java.util.List;
 
+import androidx.annotation.IntDef;
+import androidx.annotation.Nullable;
+
 /**
  * Interface for persisting and retrieving wallpaper specific preferences.
  */