Disable AVF remote attestation on raviole devices

The VM DICE chain support required by AVF remote
attestation is only introduced from Pixel 7.

Bug: 341292601
Test: run VM remote attestation on Pixel 6 and check it is
disabled

Change-Id: I20d25c59825eee77bffc9201e8751c0354c43f3a
diff --git a/device-whitefin.mk b/device-whitefin.mk
index 0e03ece..41197dd 100644
--- a/device-whitefin.mk
+++ b/device-whitefin.mk
@@ -120,3 +120,5 @@
 		device/google/raviole/location/gps_user.xml:$(TARGET_COPY_OUT_VENDOR)/etc/gnss/gps.xml
 endif
 
+# Disable AVF Remote Attestation
+PRODUCT_AVF_REMOTE_ATTESTATION_DISABLED := true