Separate system_ext_hwservice_contexts out of system sepolicy.

Bug: 137712473
Test: boot crosshatch
Change-Id: Ic5774da74e200b9d7699ac2240a12e7616dc512a
diff --git a/private/file_contexts b/private/file_contexts
index a6c4edd..6fa1c56 100644
--- a/private/file_contexts
+++ b/private/file_contexts
@@ -422,8 +422,9 @@
 /(system_ext|system/system_ext)/etc/passwd          u:object_r:system_passwd_file:s0
 /(system_ext|system/system_ext)/overlay(/.*)?       u:object_r:vendor_overlay_file:s0
 
-/(system_ext|system/system_ext)/etc/selinux/system_ext_file_contexts  u:object_r:file_contexts_file:s0
-/(system_ext|system/system_ext)/etc/selinux/system_ext_seapp_contexts u:object_r:seapp_contexts_file:s0
+/(system_ext|system/system_ext)/etc/selinux/system_ext_file_contexts      u:object_r:file_contexts_file:s0
+/(system_ext|system/system_ext)/etc/selinux/system_ext_hwservice_contexts u:object_r:hwservice_contexts_file:s0
+/(system_ext|system/system_ext)/etc/selinux/system_ext_seapp_contexts     u:object_r:seapp_contexts_file:s0
 
 #############################
 # Vendor files from /(product|system/product)/vendor_overlay