Update dependency com.android.tools.build:gradle to v8.9.1

Author: renovate[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ junit_version = "4.12"
 test_ext_junit_version = "1.2.1"
 espresso_core = "3.6.1"
 
-android-gradle-plugin = "8.7.2"
+android-gradle-plugin = "8.9.1"
 android-minSdk = "21"
 android-compileSdk = "35"
 android-buildTools = "35.0.0"