Remove action bar from wallpaper picker

Bug: 5295678

Change-Id: I50bb4bee3d9d54f28ef4a46ed9754701045d38c7
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index d0ca53e..05838a6 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -85,7 +85,7 @@
 
         <activity
             android:name="com.android.launcher2.WallpaperChooser"
-            style="@style/Theme.WallpaperPicker"
+            android:theme="@style/Theme.WallpaperPicker"
             android:label="@string/pick_wallpaper"
             android:icon="@drawable/ic_launcher_wallpaper"
             android:finishOnCloseSystemDialogs="true"