Unify permissions under UPDATE_DEVICE_STATS.

The UPDATE_DEVICE_STATS permission has become the de-facto mechanism
that platform components use to shift blame for resource usage, so
it's confusing to also have a separate MODIFY_NETWORK_ACCOUNTING
permission.  So this change replaces MODIFY_NETWORK_ACCOUNTING with
UPDATE_DEVICE_STATS.

Bug: 62483389
Test: builds, boots
Exempt-From-Owner-Approval: Bug 63673347
Change-Id: I872759f02327b6d531ec2338bd876890aded60ad
diff --git a/core/res/AndroidManifest.xml b/core/res/AndroidManifest.xml
index 3e3585b..885a54a 100644
--- a/core/res/AndroidManifest.xml
+++ b/core/res/AndroidManifest.xml
@@ -3145,9 +3145,7 @@
     <permission android:name="android.permission.MANAGE_FALLBACK_SUBSCRIPTION_PLANS"
         android:protectionLevel="signature|privileged" />
 
-    <!-- @SystemApi Allows an application to account its network traffic against other UIDs. Used
-         by system services like download manager and media server. Not for use by
-         third party apps. @hide -->
+    <!-- @SystemApi @hide @deprecated use UPDATE_DEVICE_STATS instead -->
     <permission android:name="android.permission.MODIFY_NETWORK_ACCOUNTING"
         android:protectionLevel="signature|privileged" />