Request applovin adapter update to version 12.4.2

[st21a1]

To adapt to the latest Apple privacy policy, We updated the Google Mobile Ads Unity Plugin to the latest version v9.1.0 and the AppLovin Unity Mediation Plugin to v7.2.1. However, an issue was discovered:
In the case of frequent account switching, the CMP (Consent Management Platform) would call the method to set SDK consent value multiple times. In the iOS implementation of the AppLovinSetHasUserConsent method [ALPrivacySettings setHasUserConsent:hasUserConsent];, there is a chance of freezing.
I saw that AppLovin's iOS SDK v12.4.2 fixed this issue, so the mediation SDK also needs to be updated.