Add :sample:android-app standalone Android application module (#180)

* Add :sample:android-app standalone Android application module (#171)

Creates a new :sample:android-app module (com.android.application) that
depends on :sample, :featured-debug-ui, and :featured-platform. Wires
DataStoreConfigValueProvider via defaultLocalProvider(context) and shows
FeatureFlagsDebugScreen on demand.

Also populates :sample's androidMain manifest and MainActivity so the
existing KMP sample module can run as a self-contained Android activity.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Handle system back to close debug screen in MainActivity

* Fix simplify issues in sample/android-app

- Delete accidental MainActivity from :sample KMP library module
- Revert :sample androidMain manifest to empty (library must not declare launcher Activity)
- Remove androidMain deps block from :sample (belonged to deleted MainActivity)
- Remove featured-debug-ui from :sample commonMain (only needed in android-app)
- android-app: fix import order for BackHandler
- android-app: use applicationContext instead of this for defaultLocalProvider
- android-app: add shrinkResources = true alongside isMinifyEnabled
- android-app: add androidx.appcompat for Theme.AppCompat.Light.NoActionBar
- android-app: remove tools:replace (library manifest no longer declares theme)

* Use android.targetSdk catalog key instead of compileSdk for targetSdk

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: kirich1409

sample/android-app/build.gradle.kts

@@ -0,0 +1,48 @@
+plugins {
+    alias(libs.plugins.androidApplication)
+    alias(libs.plugins.composeCompiler)
+}
+
+android {
+    namespace = "dev.androidbroadcast.featured.sample.app"
+    compileSdk =
+        libs.versions.android.compileSdk
+            .get()
+            .toInt()
+
+    defaultConfig {
+        applicationId = "dev.androidbroadcast.featured.sample"
+        minSdk =
+            libs.versions.android.minSdk
+                .get()
+                .toInt()
+        targetSdk =
+            libs.versions.android.targetSdk
+                .get()
+                .toInt()
+        versionCode = 1
+        versionName = "1.0.0"
+    }
+
+    buildFeatures {
+        compose = true
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+            )
+        }
+    }
+}
+
+dependencies {
+    implementation(project(":sample"))
+    implementation(project(":featured-debug-ui"))
+    implementation(project(":featured-platform"))
+    implementation(libs.androidx.activity.compose)
+    implementation(libs.androidx.appcompat)
+}

sample/android-app/src/main/AndroidManifest.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application
+        android:label="Featured Sample"
+        android:theme="@style/Theme.AppCompat.Light.NoActionBar">
+        <activity
+            android:name="dev.androidbroadcast.featured.sample.MainActivity"
+            android:exported="true"
+            android:windowSoftInputMode="adjustResize">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

sample/android-app/src/main/kotlin/dev/androidbroadcast/featured/sample/MainActivity.kt

@@ -0,0 +1,42 @@
+package dev.androidbroadcast.featured.sample
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.BackHandler
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.saveable.rememberSaveable
+import androidx.compose.runtime.setValue
+import dev.androidbroadcast.featured.ConfigValues
+import dev.androidbroadcast.featured.SampleApp
+import dev.androidbroadcast.featured.debugui.FeatureFlagsDebugScreen
+import dev.androidbroadcast.featured.platform.defaultLocalProvider
+
+class MainActivity : ComponentActivity() {
+    // ConfigValues is held at Activity scope for this sample.
+    // In production, move to Application or a DI singleton to avoid
+    // recreating (and re-opening) the DataStore file on every rotation.
+    private val configValues by lazy {
+        ConfigValues(localProvider = defaultLocalProvider(applicationContext))
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            var showDebug by rememberSaveable { mutableStateOf(false) }
+
+            if (showDebug) {
+                BackHandler { showDebug = false }
+                FeatureFlagsDebugScreen(configValues = configValues)
+            } else {
+                SampleApp(
+                    configValues = configValues,
+                    onOpenDebugUi = { showDebug = true },
+                )
+            }
+        }
+    }
+}

settings.gradle.kts

@@ -38,6 +38,7 @@ plugins {
 
 include(":featured-gradle-plugin")
 include(":sample")
+include(":sample:android-app")
 include(":core")
 include(":featured-compose")
 include(":featured-registry")