Add build time feature flag for pvm remote attestation

Bug: 299604057
Test: m com.android.virt
Change-Id: Iabc9ae83b4c54bdfcb9657775cf7cb0c78bc9bbf
diff --git a/Android.bp b/Android.bp
index 4fa696f..22581b0 100644
--- a/Android.bp
+++ b/Android.bp
@@ -36,6 +36,7 @@
         "release_avf_enable_dice_changes",
         "release_avf_enable_llpvm_changes",
         "release_avf_enable_multi_tenant_microdroid_vm",
+        "release_avf_enable_remote_attestation",
         "release_avf_enable_vendor_modules",
     ],
     properties: [
@@ -55,6 +56,9 @@
         release_avf_enable_multi_tenant_microdroid_vm: {
             cfgs: ["payload_not_root"],
         },
+        release_avf_enable_remote_attestation: {
+            cfgs: ["remote_attestation"],
+        },
         release_avf_enable_vendor_modules: {
             cfgs: ["vendor_modules"],
         },