feat(android): ai chat scaffold (#11124)

Co-authored-by: graphite-app[bot] <96075541+graphite-app[bot]@users.noreply.github.com>
Co-authored-by: eyhn <cneyhn@gmail.com>

packages/frontend/apps/android/App/variables.gradle

@@ -1,5 +1,6 @@
 ext {
-    minSdkVersion = 22
-    compileSdkVersion = 35
-    targetSdkVersion = 35
+    minSdkVersion = libs.versions.minSdk.get().toInteger()
+    compileSdkVersion = libs.versions.compileSdk.get().toInteger()
+    targetSdkVersion = libs.versions.targetSdk.get().toInteger()
+    kotlin_version = libs.versions.kotlin.get()
 }