init: android project scaffold (Phase 28.1)

- Kotlin DSL build with version catalog (AGP 8.7, Kotlin 2.1, Compose BOM 2025.01)
- app module: Compose + Material 3, dark theme, network security config
- DualNetworkTestScreen — Phase 28.1 gate screen (buttons wired in 28.1.2)
- YarisApp, MainActivity, YarisOBDTheme
- ProGuard rules for Retrofit/OkHttp/Kotlinx Serialization/Coil/MapLibre/Room
- cleartext allowed for 10.42.0.1 + yaris.local
- gradle wrapper properties (needs Android Studio to generate wrapper jar)

android/app/src/main/AndroidManifest.xml

@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <!-- Internet: Pi hotspot API calls + remote server uploads -->
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <!-- Foreground service for uploads (28.3) -->
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_DATA_SYNC" />
+
+    <!-- Notification permission for upload progress (Android 13+) -->
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <!-- Access external storage for downloaded dashcam files -->
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
+        android:maxSdkVersion="32" />
+
+    <application
+        android:name=".YarisApp"
+        android:allowBackup="false"
+        android:fullBackupOnly="false"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.YarisOBD"
+        android:usesCleartextTraffic="true"
+        android:networkSecurityConfig="@xml/network_security_config">
+
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.YarisOBD">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>