Add apk build

apk/build.gradle

@@ -0,0 +1,18 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.11.0'
+        classpath 'org.jetbrains.kotlin:kotlin-gradle-plugin:2.2.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+tasks.register('clean', Delete) {
+    delete rootProject.layout.buildDirectory
+}