Use levelFrom=user for v2 apps

This is needed, at least short term

Bug:34231507
Test: Builds
Change-Id: Id313c4f3e40c17b0eead50facf474a890cda5c85

private/seapp_contexts

@@ -103,8 +103,8 @@ user=shared_relro domain=shared_relro
 user=shell seinfo=platform domain=shell type=shell_data_file
 user=_isolated domain=isolated_app 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 isV2App=true domain=untrusted_v2_app type=app_data_file levelFrom=all
+user=_app isV2App=true isEphemeralApp=true domain=ephemeral_app type=app_data_file levelFrom=user
+user=_app isV2App=true domain=untrusted_v2_app type=app_data_file levelFrom=user
 user=_app isPrivApp=true domain=priv_app type=app_data_file levelFrom=user
 user=_app minTargetSdkVersion=26 domain=untrusted_app type=app_data_file levelFrom=user
 user=_app domain=untrusted_app_25 type=app_data_file levelFrom=user