Add config resource for disabling KeyguardService

Bug: 14102545
Change-Id: I0c7936e16a8bda98e49e6a2c396117d7a8fd5664
diff --git a/packages/SystemUI/AndroidManifest.xml b/packages/SystemUI/AndroidManifest.xml
index d371d70..327df8d 100644
--- a/packages/SystemUI/AndroidManifest.xml
+++ b/packages/SystemUI/AndroidManifest.xml
@@ -273,7 +273,8 @@
 
         <service
             android:name=".keyguard.KeyguardService"
-            android:exported="true" />
+            android:exported="true"
+            android:enabled="@bool/config_enableKeyguardService" />
 
         <activity android:name=".Somnambulator"
             android:label="@string/start_dreams"