Revert "Change priv-apps /home/home labels to privapp_data_file"

There is a problem with on-disk labeling of files created by secondary
dex background compilation which is causing unexpected denials to show
up. Restore the old labeling until we are able to fix the underlying
problem.

Steps to reproduce:
  1) boot android device.
  2) adb root
  3) Run cmd package compile -r bg-dexopt --secondary-dex com.google.android.gms
  4) Examine the files in /data/user_de/0/com.google.android.gms
Expected:
  All files have the label privapp_data_file
Actual:
  The files in /data/user_de/0/com.google.android.gms/app_chimera/m
  are labeled "app_data_file", not "privapp_data_file".

This reverts commit 4df57822.

Bug: 112357170
Test: policy compiles
Change-Id: I38ba75c92c9c46e6a1fdbc02e3dc80c63adccaa8

private/seapp_contexts

@@ -112,7 +112,7 @@ user=_isolated domain=isolated_app levelFrom=all
 user=_app seinfo=media domain=mediaprovider name=android.process.media type=app_data_file levelFrom=user
 user=_app seinfo=platform domain=platform_app type=app_data_file levelFrom=user
 user=_app isV2App=true isEphemeralApp=true domain=ephemeral_app type=app_data_file levelFrom=all
-user=_app isPrivApp=true domain=priv_app type=privapp_data_file levelFrom=user
+user=_app isPrivApp=true domain=priv_app type=app_data_file levelFrom=user
 user=_app minTargetSdkVersion=28 domain=untrusted_app type=app_data_file levelFrom=all
 user=_app minTargetSdkVersion=26 domain=untrusted_app_27 type=app_data_file levelFrom=user
 user=_app domain=untrusted_app_25 type=app_data_file levelFrom=user