cros_unibuild_convert: move has-backlight to hardware-properties

This was moved in the schema, change this script to generate the right
content.

BUG=chromium:1115620
TEST=run for elm

Change-Id: Ib807cbceafe6145d31b783da65ae9336b4445d24
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2368199
Tested-by: Jack Rosenthal <jrosenth@chromium.org>
Auto-Submit: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Trent Begin <tbegin@chromium.org>
Reviewed-by: Trent Begin <tbegin@chromium.org>
diff --git a/contrib/cros_unibuild_convert.py b/contrib/cros_unibuild_convert.py
index 8427ac7..7860d45 100755
--- a/contrib/cros_unibuild_convert.py
+++ b/contrib/cros_unibuild_convert.py
@@ -578,9 +578,6 @@
             'ucm-suffix': (M_PUBLIC, lambda d, _: d.internal_ucm_suffix),
         },
     },
-    'cros-healthd': {
-        'has-backlight': (M_PUBLIC, genconf_has_backlight),
-    },
     'fingerprint': {
         'board': (M_PUBLIC, genconf_fp_board),
         'fingerprint-sensor-type': (M_PUBLIC, genconf_fp_type),
@@ -608,6 +605,7 @@
         'signature-id': (M_PRIVATE, genconf_signature_id),
     },
     'hardware-properties': {
+        'has-backlight': (M_PUBLIC, genconf_has_backlight),
         'psu-type': (M_PUBLIC, genconf_psu_type),
     },
     'identity': {