[#1457] Update dependency com.android.billingclient:billing to v8

Co-authored-by: Mustafa Ozhan <mr.mustafa.ozhan@gmail.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -29,7 +29,7 @@ navigation = "2.8.9"
 playCoreReview = "2.0.2"
 kotlinXDateTime = "0.6.2"
 coroutines = "1.10.2"
-billing = "7.1.1"
+billing = "8.0.0"
 leakCanary = "2.14"
 sqlDelight = "1.5.5"
 lifecycle = "2.8.7"