Simplify notification permission check, drop redundant restorePurchases at bind

hasNotificationPermission() already handles pre-T via short-circuit.
onBillingSetupFinished already calls queryExistingPurchases() once the client is ready.

Author: tobihagemann

presentation/src/main/java/org/cryptomator/presentation/CryptomatorApp.kt

@@ -133,7 +133,6 @@ class CryptomatorApp : MultiDexApplication(), HasComponent<ApplicationComponent>
 				Timber.tag("App").i("IAP Billing service connected")
 				iapBillingServiceBinder = service as IapBillingService.Binder
 				iapBillingServiceBinder?.init(Companion.applicationContext)
-				iapBillingServiceBinder?.restorePurchases()
 				drainPendingProductDetailsCallbacks()
 			}
 

presentation/src/main/java/org/cryptomator/presentation/ui/activity/WelcomeActivity.kt

@@ -197,11 +197,7 @@ class WelcomeActivity : BaseActivity<ActivityWelcomeBinding>(ActivityWelcomeBind
 		if (!this::pagerAdapter.isInitialized) {
 			return
 		}
-		val granted = grantedOverride ?: if (needsNotificationPermission()) {
-			hasNotificationPermission()
-		} else {
-			true
-		}
+		val granted = grantedOverride ?: hasNotificationPermission()
 		pagerAdapter.notificationsFragment?.updatePermissionState(granted)
 	}