Bump AGP to 8.9.1 (required by androidx.core 1.17.0 transitive)

build.gradle.kts

@@ -1,4 +1,4 @@
 plugins {
-    id("com.android.application") version "8.5.2" apply false
+    id("com.android.application") version "8.9.1" apply false
     id("org.jetbrains.kotlin.android") version "1.9.24" apply false
 }