Revert "wifi_stack: Move to network_stack process"

This reverts commit 1086c7d71d7f614addf36c3923fc5ce96da2cdde.

Reason for revert: Wifi services no longer plan to be a separate
APK/process for mainline. Will instead become a jar loaded from Apex.

Bug: 144722612
Test: Device boots up & connects to wifi networks
Change-Id: I69ccc6afbe15db88f516cdc64e13d8cfdb0c743c
diff --git a/private/seapp_contexts b/private/seapp_contexts
index 17c22e1..c4b0e6f 100644
--- a/private/seapp_contexts
+++ b/private/seapp_contexts
@@ -144,7 +144,9 @@
 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=network_stack domain=network_stack type=radio_data_file
+# TODO (b/135691051): wifi stack is temporarily a separate process. Will merge to network_stack once non-formal API dependencies are fixed.
+user=network_stack seinfo=network_stack name=com.android.server.wifistack domain=wifi_stack
+user=network_stack seinfo=network_stack domain=network_stack levelFrom=all type=radio_data_file
 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