Default PRODUCT_CGROUP_V2_SYS_APP_ISOLATION_ENABLED to true

This variable can still be overridden to false, however we plan to add
a dependency on it being enabled in the near future.

Test: m
Test: cuttlefish boot with and without a device override
Bug: 377579705
Change-Id: I31f919f0c29fc606bc33dd843171a36924275363
diff --git a/core/android_soong_config_vars.mk b/core/android_soong_config_vars.mk
index e442f72..4e7d882 100644
--- a/core/android_soong_config_vars.mk
+++ b/core/android_soong_config_vars.mk
@@ -118,6 +118,8 @@
 
 ifdef PRODUCT_CGROUP_V2_SYS_APP_ISOLATION_ENABLED
 $(call add_soong_config_var_value,ANDROID,cgroup_v2_sys_app_isolation,$(PRODUCT_CGROUP_V2_SYS_APP_ISOLATION_ENABLED))
+else
+$(call add_soong_config_var_value,ANDROID,cgroup_v2_sys_app_isolation,true)
 endif
 
 $(call add_soong_config_var_value,ANDROID,release_avf_allow_preinstalled_apps,$(RELEASE_AVF_ALLOW_PREINSTALLED_APPS))