sepolicy change for NetworkStack signature

Update the seinfo to the new network_stack seinfo, as the network stack
is now using its own certificate.
Remove the hard-coded package name, which may differ depending on
devices, and specify (uid, signature, priv-app) instead.

Bug: 124033493
Test: m
Change-Id: If3bbc21cf83f5d17406e9615833ee43011c9c9bc
diff --git a/private/seapp_contexts b/private/seapp_contexts
index 964f47d..628b7d6 100644
--- a/private/seapp_contexts
+++ b/private/seapp_contexts
@@ -146,7 +146,7 @@
 user=_app seinfo=platform name=com.android.traceur domain=traceur_app type=app_data_file levelFrom=all
 user=system seinfo=platform domain=system_app type=system_app_data_file
 user=bluetooth seinfo=platform domain=bluetooth type=bluetooth_data_file
-user=network_stack seinfo=platform name=com.android.mainline.networkstack domain=network_stack levelFrom=all
+user=network_stack seinfo=network_stack domain=network_stack levelFrom=all
 user=nfc seinfo=platform domain=nfc type=nfc_data_file
 user=secure_element seinfo=platform domain=secure_element levelFrom=all
 user=radio seinfo=platform domain=radio type=radio_data_file