feat(common): HttpParams fromObject accepts ReadonlyArray<string> (#31072)

Fixes #28452

PR Close #31072

packages/common/http/src/params.ts

@@ -109,7 +109,7 @@ export interface HttpParamsOptions {
   fromString?: string;
 
   /** Object map of the HTTP parameters. Mutually exclusive with `fromString`. */
-  fromObject?: {[param: string]: string | string[]};
+  fromObject?: {[param: string]: string | ReadonlyArray<string>};
 
   /** Encoding codec used to parse and serialize the parameters. */
   encoder?: HttpParameterCodec;