Virtual Face HAL belongs to "system", not "vendor"

Hence, other files should be "system_*", not "vendor_*".

Bug: 387192232
Test: m com.android.hardware.biometrics.face.virtual
Change-Id: I6fd5dc4d70bd6a32bdaf4687af61f4a2e3d5972b
diff --git a/apex/com.android.biometrics.virtual.face-file_contexts b/apex/com.android.biometrics.virtual.face-file_contexts
index 07fc0a8..8d9b86c 100644
--- a/apex/com.android.biometrics.virtual.face-file_contexts
+++ b/apex/com.android.biometrics.virtual.face-file_contexts
@@ -1,3 +1,3 @@
-(/.*)?                                          u:object_r:vendor_file:s0
-/etc(/.*)?                                      u:object_r:vendor_configs_file:s0
+(/.*)?                                          u:object_r:system_file:s0
+/lib(64)?(/.*)                                  u:object_r:system_lib_file:s0
 /bin/hw/android\.hardware\.biometrics\.face-service\.example u:object_r:virtual_face_exec:s0