Declare touch_property_type attribute for touch-related properties

Pass ROM build of all git_main targets:
https://android-build.googleplex.com/builds/abtd/run/L52500030006128092/
https://android-build.corp.google.com/abtd/run/L93900030006078492/
https://android-build.corp.google.com/abtd/run/L15800030006086232/
https://android-build.corp.google.com/abtd/run/L27700030006086619/

Bug: 361237875
Test: mm and flash rom
Change-Id: I9b80030088031bf401e0dc8be403b3011e4f55e0
diff --git a/common/vendor/attributes b/common/vendor/attributes
index 25b59ac..51e6703 100644
--- a/common/vendor/attributes
+++ b/common/vendor/attributes
@@ -1,2 +1,5 @@
 attribute pixel_battery_domain;
 attribute pixel_battery_service_type;
+
+#touch attribute for touch-related properties.
+attribute touch_property_type;