[HttpKernel] minor optimalization at bundle initialization

fast check to avoid six array method calls

| Q             | A
| ------------- | ---
| Bug fix?      | [no]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [|no]
| Tests pass?   | [yes]
| Fixed tickets | #9657
| License       | MIT
| Doc PR        | 

That's a rebased version of #9657 on 2.2 + another optimization suggested by @GromNaN