feat(ads): reward-verification primitives for react-native

[peterporfy]

Description

DRAFT as it depends on open purchases-ios, purchases-android and purchases-hybrid-common changes.

Exposes the rewarded ad verification primitives so it can be used with unsupported react-native admob libraries.

Still need to test e2e once the new sdks are released - but the API usage will look something like:

  import { RewardedAd, RewardedAdEventType } from "react-native-google-mobile-ads";
  import Purchases from "react-native-purchases";

  async function showRewardedAd(impressionId: string) {
    const token = await Purchases.generateRewardVerificationToken(impressionId);

    const rewarded = RewardedAd.createForAdRequest("ca-app-pub-.../...", {
      serverSideVerificationOptions: { customData: token.customData },
      ...
    });

    rewarded.addAdEventListener(RewardedAdEventType.EARNED_REWARD, async () => {
      const result = await Purchases.pollRewardVerification(token.clientTransactionId);
      if (result.failed) {
        ...
        return;
      }
      grant(result.reward);
      result.moreRewards.forEach(grant);
    });

    rewarded.load();
    ...
  }

[peterporfy]

This change is part of the following stack:

• feat(ads): reward-verification primitives for react-native #1828 ◀

_{Change managed by git-spice.}

[RevenueCat-Danger-Bot]

	1 Error
🚫	Label the PR using one of the change type labels. If you are not sure which label to use, choose pr:other.

Label	Description
pr:feat	A new feature. Use along with pr:breaking to force a major release.
pr:fix	A bug fix. Use along with pr:force_minor to force a minor release.
pr:other	Other changes. Catch-all for anything that doesn't fit the above categories. Releases that only contain this label will not be released. Use along with pr:force_patch, or pr:force_minor to force a patch or minor release.
pr:RevenueCatUI	Use along any other tag to mark a PR that only contains RevenueCatUI changes
pr:next_release	Preparing a new release
pr:dependencies	Updating a dependency
pr:phc_dependencies	Updating purchases-hybrid-common dependency
pr:changelog_ignore	The PR will not be included in the changelog. This label doesn't determine the type of bump of the version and must be combined with pr:feat, pr:fix or pr:other.

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