awaitStorefrontLocale
This method will try to obtain the Store (Google/Amazon) locale. Note: this locale only has a region set. If there is any error, it will return null and log said error. Coroutine friendly version of Purchases.getStorefrontLocale.
Return
The Store locale. Note: this locale only has a region set.
Throws
PurchasesException
with a PurchasesError if there's an error retrieving the country code.