This commit updates:
- Android Gradle Plugin to 8.11.0
- Compile/Target SDK to 36
- Google Play Billing Library to 8.0.0
The `BillingClient` is updated to use the new `PendingPurchasesParams` and `QueryPurchasesParams` APIs.
This commit updates the Android Gradle Plugin (AGP) from version 8.10.0 to 8.10.1 and the Kotlin Symbol Processing (KSP) plugin from version 2.1.20-2.0.0 to 2.1.21-2.0.1.
These changes are applied in the root `build.gradle.kts` file and the `buildSrc/build.gradle.kts` file.