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/public/property.te b/public/property.te
index 533c57f..63a2e92 100644
--- a/public/property.te
+++ b/public/property.te
@@ -130,6 +130,7 @@
 system_vendor_config_prop(audio_config_prop)
 system_vendor_config_prop(bootanim_config_prop)
 system_vendor_config_prop(bluetooth_config_prop)
+system_vendor_config_prop(build_attestation_prop)
 system_vendor_config_prop(build_config_prop)
 system_vendor_config_prop(build_odm_prop)
 system_vendor_config_prop(build_vendor_prop)