The library does not work with apps that do not use subscriptions

[MRZ07]

Subscriptions are still processed even when an empty subscription list is provided to the library, resulting in the following error:

Fatal Exception: java.lang.IllegalArgumentException
Product list cannot be empty.
com.android.billingclient.api.QueryProductDetailsParams$Builder.setProductList (com.android.billingclient:billing@@7.0.0:2)
com.funsol.iap.billing.FunSolBillingHelper.fetchAvailableAllSubsProducts (FunSolBillingHelper.kt:200)
com.funsol.iap.billing.FunSolBillingHelper.access$fetchAvailableAllSubsProducts (FunSolBillingHelper.kt:19)
com.funsol.iap.billing.FunSolBillingHelper$startConnection$1$onBillingSetupFinished$1$1.invokeSuspend (FunSolBillingHelper.kt:140)
kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith (ContinuationImpl.kt:33)
kotlinx.coroutines.DispatchedTask.run (DispatchedTask.kt:106)
kotlinx.coroutines.internal.LimitedDispatcher$Worker.run (LimitedDispatcher.kt:115)
kotlinx.coroutines.scheduling.TaskImpl.run (Tasks.kt:100)
kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely (CoroutineScheduler.kt:584)
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask (CoroutineScheduler.kt:793)
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker (CoroutineScheduler.kt:697)
kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run (CoroutineScheduler.kt:684)