Add missing import

Author: bmarty

libraries/featureflag/api/src/main/kotlin/io/element/android/libraries/featureflag/api/FeatureFlags.kt

@@ -9,6 +9,7 @@ package io.element.android.libraries.featureflag.api
 
 import io.element.android.appconfig.OnBoardingConfig
 import io.element.android.libraries.core.meta.BuildMeta
+import io.element.android.libraries.core.meta.BuildType
 
 /**
  * To enable or disable a FeatureFlags, change the `defaultValue` value.