Move Dream OOBE activity to SettingsGoogle

This will only be used on pixel devices.

Bug: 217555049
Test: locally on device
Change-Id: Ica7cddae8b8b8693a83da95d25a8d0827aed0945

src/com/android/settings/dream/IDreamItem.java

@@ -18,7 +18,10 @@ package com.android.settings.dream;
 
 import android.graphics.drawable.Drawable;
 
-interface IDreamItem {
+/**
+ * Interface representing a dream item to be displayed.
+ */
+public interface IDreamItem {
     CharSequence getTitle();
 
     Drawable getIcon();