Switch to listening for USER_INITIALIZE broadcast in the Settings app.

The PRE_BOOT_COMPLETED broadcast is no longer sent when creating a new
profile.
Also, we no longer listen to BOOT_COMPLETED as that adds too much overload.

Bug: 17102460
Change-Id: I05eb56c7a05748e8a91b9717966c20ac586d90ef
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 27738c3..af5af30 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -97,8 +97,7 @@
 
         <receiver android:name="ManagedProfileSetup">
             <intent-filter>
-                <action android:name="android.intent.action.BOOT_COMPLETED"/>
-                <action android:name="android.intent.action.PRE_BOOT_COMPLETED"/>
+                <action android:name="android.intent.action.USER_INITIALIZE"/>
             </intent-filter>
         </receiver>