feat: deprecate @angular/http in favor of @angular/common/http (#18906)

As of 5.0, @angular/http is deprecated. @angular/common/http will
be the official HTTP API in Angular going forward.

PR Close #18906

packages/common/http/src/params.ts

@@ -11,7 +11,7 @@
  *
  * Used by `HttpParams`.
  *
- *  @experimental
+ * @stable
  **/
 export interface HttpParameterCodec {
   encodeKey(key: string): string;
@@ -25,7 +25,7 @@ export interface HttpParameterCodec {
  * A `HttpParameterCodec` that uses `encodeURIComponent` and `decodeURIComponent` to
  * serialize and parse URL parameter keys and values.
  *
- * @experimental
+ * @stable
  */
 export class HttpUrlEncodingCodec implements HttpParameterCodec {
   encodeKey(k: string): string { return standardEncoding(k); }
@@ -79,7 +79,7 @@ interface Update {
  *
  * This class is immutable - all mutation operations return a new instance.
  *
- * @experimental
+ * @stable
  */
 export class HttpParams {
   private map: Map<string, string[]>|null;