Add dynamic notification

Co-authored-by: Moe <moe@example.com>
Co-authored-by: 世界 <i@sekai.icu>

app/src/main/java/io/nekohasekai/sfa/constant/SettingsKey.kt

@@ -6,6 +6,7 @@ object SettingsKey {
     const val SERVICE_MODE = "service_mode"
     const val CHECK_UPDATE_ENABLED = "check_update_enabled"
     const val DISABLE_MEMORY_LIMIT = "disable_memory_limit"
+    const val DYNAMIC_NOTIFICATION = "dynamic_notification"
 
     const val PER_APP_PROXY_ENABLED = "per_app_proxy_enabled"
     const val PER_APP_PROXY_MODE = "per_app_proxy_mode"