Add permission to CONNECTION_MANAGER PhoneAccount registration.

We need to add a system-level permission for registering PhoneAccounts
to prevent third party apps from registering and being able to
control the call.

Bug: 18100571
Change-Id: I06de9311620b271904babc78f23faff90a15e1a9
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 5d11fb3..427b248 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -46,6 +46,11 @@
             android:protectionLevel="signature"/>
 
     <permission
+            android:name="com.android.server.telecom.permission.REGISTER_CONNECTION_MANAGER"
+            android:label="Register CONNECTION_MANAGER PhoneAccount"
+            android:protectionLevel="signature"/>
+
+    <permission
             android:name="android.permission.BROADCAST_CALLLOG_INFO"
             android:label="Broadcast the call type/duration information"
             android:protectionLevel="signature|system"/>