Enable UVC support on raviole

Raven and Oriole now supports UVC gadget function. Setting this flag
triggers the framework to surface the UVC specific functionality and UI.

Test: Manually tested that the UVC functionality is enabled
Bug: 242344221
Change-Id: I979a2d8f5a3d35bc8dffac87e2e9e29c1a03043a
diff --git a/device-raven.mk b/device-raven.mk
index 2afddb6..16129fc 100644
--- a/device-raven.mk
+++ b/device-raven.mk
@@ -303,3 +303,6 @@
 PRODUCT_SYSTEM_PROPERTIES += \
     persist.settings.large_screen_opt.enabled=false
 
+# Enable DeviceAsWebcam support
+PRODUCT_VENDOR_PROPERTIES += \
+    ro.usb.uvc.enabled=true