Add build properties for attestation feature

The properties for attestation are congifured in build.prop files and
used by frameworks Build.java.
Allow vendor_init to set these properties and allow Zygote to access
them.

Bug: 211547922
Test: SELinuxUncheckedDenialBootTest
Change-Id: I5666524a9708c6fefe113ad4109b8a344405ad57
diff --git a/private/property_contexts b/private/property_contexts
index 546fab0..45b9fe7 100644
--- a/private/property_contexts
+++ b/private/property_contexts
@@ -1067,6 +1067,11 @@
 ro.product.vendor_dlkm.model        u:object_r:build_vendor_prop:s0 exact string
 ro.product.vendor_dlkm.name         u:object_r:build_vendor_prop:s0 exact string
 
+# build props for attestation feature are set by property_service
+ro.product.brand_for_attestation u:object_r:build_attestation_prop:s0 exact string
+ro.product.model_for_attestation u:object_r:build_attestation_prop:s0 exact string
+ro.product.name_for_attestation  u:object_r:build_attestation_prop:s0 exact string
+
 # GRF property for the first api level of the vendor partition
 ro.board.first_api_level u:object_r:build_vendor_prop:s0 exact int
 ro.board.api_level       u:object_r:build_vendor_prop:s0 exact int