Fix the GET_APP_OPS_STATS permission's comment.

Test: none
Change-Id: I182649ad3184db848ffcf5a9b2c1140fd3df1dba
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index a3cb350..167dfc6 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -2371,7 +2371,8 @@
     <permission android:name="android.permission.UPDATE_DEVICE_STATS"
         android:protectionLevel="signature|privileged" />
 
-    <!-- @SystemApi @hide Allows an application to collect battery statistics -->
+    <!-- @SystemApi @hide Allows an application to collect application operation statistics.
+         Not for use by third party apps. -->
     <permission android:name="android.permission.GET_APP_OPS_STATS"
         android:protectionLevel="signature|privileged|development" />