[EN] Interfaces

• [EN]AcknowledgeListener

• [EN]ConsumeListener

• [EN]IapResultListener

• [EN]ProductDetailsListener

• [EN]PurchaseClientStateListener

• [EN]PurchasesListener (deprecated)

• [EN]PurchasesUpdatedListener

• [EN]QueryPurchasesListener

• [EN]RecurringProductListener

• [EN]StoreInfoListener