Phase 1: minimal Kotlin Android app shows Hub /health

Scaffold the Android Gradle project under android/ mirroring the proven
internet_use_control toolchain: Gradle wrapper 8.11.1, AGP 8.7.3, Kotlin
2.0.21, compileSdk/targetSdk 35, Java/Kotlin 17, minSdk 29 (AGENTS.md §9).

One Activity calls GET http://192.168.20.13:8788/health off the main thread
and renders ok, service, version and every checks value plus the raw body.
INTERNET permission and usesCleartextTraffic are declared for the LAN Hub.
A failed or non-2xx call renders an explicit error line and never reports
success (AGENTS.md §10 rule 4).

applicationId au.audasmedia.hub.phone, versionName 0.1.0-phase1.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

android/app/build.gradle.kts

@@ -0,0 +1,43 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "au.audasmedia.hub.phone"
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "au.audasmedia.hub.phone"
+        // AGENTS.md §9: API 29 (Android 10) is the suggested minimum. The app
+        // targets API 35 but runs on Android 10 and up.
+        minSdk = 29
+        targetSdk = 35
+        versionCode = 1
+        versionName = "0.1.0-phase1"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+}
+
+// Phase 1 keeps the dependency set empty on purpose: the health check uses
+// HttpURLConnection (JDK/Android) and org.json (Android platform). No appcompat,
+// no okhttp, no gson.
+dependencies {
+}