Updating the onConfigUpdate method definition.

Author: Samruddhi90

common/api-review/remote-config.api.md

@@ -82,7 +82,7 @@ export function isSupported(): Promise<boolean>;
 export type LogLevel = 'debug' | 'error' | 'silent';
 
 // @public
-export function onConfigUpdate(remoteConfig: RemoteConfig, observer: ConfigUpdateObserver): Promise<Unsubscribe>;
+export function onConfigUpdate(remoteConfig: RemoteConfig, observer: ConfigUpdateObserver): Unsubscribe;
 
 // @public
 export interface RemoteConfig {

docs-devsite/remote-config.md

@@ -296,7 +296,7 @@ Starts listening for real-time config updates from the Remote Config backend and
 <b>Signature:</b>
 
 ```typescript
-export declare function onConfigUpdate(remoteConfig: RemoteConfig, observer: ConfigUpdateObserver): Promise<Unsubscribe>;
+export declare function onConfigUpdate(remoteConfig: RemoteConfig, observer: ConfigUpdateObserver): Unsubscribe;
 ```
 
 #### Parameters
@@ -308,7 +308,7 @@ export declare function onConfigUpdate(remoteConfig: RemoteConfig, observer: Con
 
 <b>Returns:</b>
 
-Promise&lt;[Unsubscribe](./remote-config.md#unsubscribe)<!-- -->&gt;
+[Unsubscribe](./remote-config.md#unsubscribe)
 
 An [Unsubscribe](./remote-config.md#unsubscribe) function to remove the listener.
 

packages/remote-config/src/api.ts

@@ -376,12 +376,12 @@ export async function setCustomSignals(
  *
  * @public
  */
-export async function onConfigUpdate(
+export function onConfigUpdate(
   remoteConfig: RemoteConfig,
   observer: ConfigUpdateObserver
-): Promise<Unsubscribe> {
+): Unsubscribe {
   const rc = getModularInstance(remoteConfig) as RemoteConfigImpl;
-  await rc._realtimeHandler.addObserver(observer);
+  rc._realtimeHandler.addObserver(observer);
   return () => {
     rc._realtimeHandler.removeObserver(observer);
   };

packages/remote-config/src/client/realtime_handler.ts

@@ -668,7 +668,7 @@ export class RealtimeHandler {
     if (this.httpRetriesRemaining > 0) {
       this.httpRetriesRemaining--;
       await new Promise(resolve => setTimeout(resolve, delayMillis));
-      await this.prepareAndBeginRealtimeHttpStream();
+      void this.prepareAndBeginRealtimeHttpStream();
     } else if (!this.isInBackground) {
       const error = ERROR_FACTORY.create(ErrorCode.CONFIG_UPDATE_STREAM_ERROR, {
         originalErrorMessage: