Expose RELEASE_AVF_SUPPORT_CUSTOM_VM_WITH_PARAVIRTUALIZED_DEVICES

expose the flag to soong. the flag is to indicate a custom VM can
use para-virtualized devices.

Bug: 333495394
Test: build
Change-Id: I4e1854b5701302ae0ec1bf73862f264642b6e418
diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index 29fb7aa..e1158bd 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -160,6 +160,7 @@
 $(call add_soong_config_var_value,ANDROID,release_avf_enable_vendor_modules,$(RELEASE_AVF_ENABLE_VENDOR_MODULES))
 $(call add_soong_config_var_value,ANDROID,release_avf_enable_virt_cpufreq,$(RELEASE_AVF_ENABLE_VIRT_CPUFREQ))
 $(call add_soong_config_var_value,ANDROID,release_avf_microdroid_kernel_version,$(RELEASE_AVF_MICRODROID_KERNEL_VERSION))
+$(call add_soong_config_var_value,ANDROID,release_avf_support_custom_vm_with_paravirtualized_devices,$(RELEASE_AVF_SUPPORT_CUSTOM_VM_WITH_PARAVIRTUALIZED_DEVICES))
 
 $(call add_soong_config_var_value,ANDROID,release_binder_death_recipient_weak_from_jni,$(RELEASE_BINDER_DEATH_RECIPIENT_WEAK_FROM_JNI))