Added experiment environment variable

.env-dist

@@ -76,3 +76,6 @@ SENTRY_DSN=""
 
 BREACH_RESOLUTION_ENABLED=1
 PRODUCT_PROMOS_ENABLED=1
+
+# Experiment Flag
+EXPERIMENT_ACTIVE=

app-constants.js

@@ -45,6 +45,7 @@ const kEnvironmentVariables = [
   "SENTRY_DSN",
   "SUPPORTED_LOCALES",
   "DELETE_UNVERIFIED_SUBSCRIBERS_TIMER",
+  "EXPERIMENT_ACTIVE",
 ];
 
 const AppConstants = { };