introduce build flavours to separate stable and alpha

apps/weblibre/android/app/build.gradle

@@ -48,6 +48,20 @@ android {
         versionName = flutterVersionName
     }
 
+    flavorDimensions "track"
+    productFlavors {
+        stable {
+            dimension "track"
+            manifestPlaceholders = [appName: "WebLibre"]
+        }
+        alpha {
+            dimension "track"
+            applicationIdSuffix ".alpha"
+            versionNameSuffix "-alpha"
+            manifestPlaceholders = [appName: "WebLibre Alpha"]
+        }
+    }
+
     dependencies {
         // implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
         implementation 'androidx.glance:glance-appwidget:1.1.1'

apps/weblibre/android/app/src/alpha/res/mipmap-anydpi-v26/launcher_icon.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@color/ic_launcher_background"/>
+  <foreground>
+      <inset
+          android:drawable="@drawable/ic_launcher_foreground"
+          android:inset="25%" />
+  </foreground>
+  <monochrome>
+      <inset
+          android:drawable="@drawable/ic_launcher_monochrome"
+          android:inset="25%" />
+  </monochrome>
+</adaptive-icon>

apps/weblibre/android/app/src/alpha/res/values/colors.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="ic_launcher_background">#FF000000</color>
+</resources>

apps/weblibre/android/app/src/main/AndroidManifest.xml

@@ -48,7 +48,7 @@
 
     
     <application
-        android:label="WebLibre"
+        android:label="${appName}"
         android:name=".MyApplication"
         android:icon="@mipmap/launcher_icon"
         android:usesCleartextTraffic="true"
@@ -78,10 +78,10 @@
         
         <activity
             android:name=".MainActivity"
-            android:label="WebLibre"
+            android:label="${appName}"
             android:exported="true"
             android:launchMode="singleTask"
-            android:taskAffinity="eu.weblibre.gecko.task"
+            android:taskAffinity="${applicationId}.task"
             android:theme="@style/LaunchTheme"
             android:supportsPictureInPicture="true"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"