Remove android:multiprocess from ShutdownActivity to ensure it runs in the system process.

Signed-off-by: Mike Lockwood <lockwood@android.com>

core/res/AndroidManifest.xml

@@ -1132,8 +1132,7 @@
 
         <activity android:name="com.android.server.ShutdownActivity"
             android:permission="android.permission.SHUTDOWN"
-            android:excludeFromRecents="true"
-            android:multiprocess="true">
+            android:excludeFromRecents="true">
             <intent-filter>
                 <action android:name="android.intent.action.ACTION_REQUEST_SHUTDOWN" />
                 <category android:name="android.intent.category.DEFAULT" />