Update gradle, add jvmtoolchain, update kotlin version, address gradle warnings

android/build.gradle

@@ -8,8 +8,8 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-      classpath 'com.google.gms:google-services:4.4.0'
-      classpath 'com.android.tools.build:gradle:8.1.1'
+      classpath 'com.google.gms:google-services:4.4.2'
+      classpath 'com.android.tools.build:gradle:8.8.0'
       classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
       // NOTE: Do not place your application dependencies here; they belong
@@ -26,7 +26,7 @@ allprojects {
     }
 }
 
-task clean(type: Delete) {
-    delete rootProject.buildDir
+tasks.register('clean', Delete) {
+  delete rootProject.layout.buildDirectory
 }