Renamed primaryUserOnly to systemUserOnly

Renamed attribute to systemUserOnly and changed its semantics. Receivers
marked with this attribute now run as system user.

Bug: 22958572
Bug: 23526250
Change-Id: I0c438d6dd7e884652ef4dc4678394d8ea7dd3cf1
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 3d85b95..15d31c7 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -475,8 +475,9 @@
         </activity>
 
         <!-- Broadcast Receiver that will process BOOT Complete and launch OTA -->
+        <!-- TODO http://b/23526250 Handle OTASP under system user -->
         <receiver android:name="OtaStartupReceiver" android:exported="false"
-                androidprv:primaryUserOnly="true">
+                androidprv:systemUserOnly="true">
             <intent-filter android:priority="100">
                  <action android:name="android.intent.action.BOOT_COMPLETED"/>
             </intent-filter>