chore: add internalUsageAttributionId to examples.

[zhunhan]

No description provided.

[usefulthink]

As far as I can tell, this change wouldn't do anything, since the implementation doesn't add unknown parameters to the URL.
I assume this is supposed to pass the value of the internalUsageAttributionId option as url-parameter internal_usage_attribution_id(?) when loading the maps API?

See here:

js-api-loader/src/index.ts

Lines 496 to 506 in a20e37b

	const params = {
	key: this.apiKey,
	channel: this.channel,
	client: this.client,
	libraries: this.libraries.length && this.libraries,
	v: this.version,
	mapIds: this.mapIds,
	language: this.language,
	region: this.region,
	authReferrerPolicy: this.authReferrerPolicy,
	};

and here:

js-api-loader/src/index.ts

Lines 369 to 411 in a20e37b

	public createUrl(): string {
	let url = this.url;
	url += `?callback=__googleMapsCallback&loading=async`;
	if (this.apiKey) {
	url += `&key=${this.apiKey}`;
	}
	if (this.channel) {
	url += `&channel=${this.channel}`;
	}
	if (this.client) {
	url += `&client=${this.client}`;
	}
	if (this.libraries.length > 0) {
	url += `&libraries=${this.libraries.join(",")}`;
	}
	if (this.language) {
	url += `&language=${this.language}`;
	}
	if (this.region) {
	url += `&region=${this.region}`;
	}
	if (this.version) {
	url += `&v=${this.version}`;
	}
	if (this.mapIds) {
	url += `&map_ids=${this.mapIds.join(",")}`;
	}
	if (this.authReferrerPolicy) {
	url += `&auth_referrer_policy=${this.authReferrerPolicy}`;
	}
	return url;
	}

(I don't know right now which of these two is used in which use-case, but both of them only handle well-known parameters).

[usefulthink]

(disregard my comment, I just now realized that the values is being passed to the map constructor and not the api loader).

[zhunhan]

(disregard my comment, I just now realized that the values is being passed to the map constructor and not the api loader).

Thank you Martin! I was caught up by something else so was not able to reply earlier. You are right, these parameters are part of mapOptions so they won't be passed as bootstrap parameters, instead, the user who initiate the map should attach this - if they copy/paste from the examples.

[zhunhan]

Updated per reviewer's suggestions. TY!