IMS: Provide net_admin permission so that IPSec could be configured/used.

IMS configures the security database in kernel with keys generated from ISIM.

Change-Id: Iae9fb85f286ff2a627369d784a127bf7d4d8f4b3
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 0c9a2ef..daab232 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -495,6 +495,12 @@
         android:label="@string/permlab_hardware_test"
         android:description="@string/permdesc_hardware_test" />
 
+    <!-- Allows access to configure network interfaces, configure/use IPSec, etc.
+         @hide -->
+    <permission android:name="android.permission.NET_ADMIN"
+        android:permissionGroup="android.permission-group.SYSTEM_TOOLS"
+        android:protectionLevel="signature" />
+
     <!-- =========================================== -->
     <!-- Permissions associated with telephony state -->
     <!-- =========================================== -->