fix: Android target API compatibility for F-Droid distribution

android/app/build.gradle

@@ -28,7 +28,7 @@ def LOCAL_KEY_PRESENT = project.hasProperty('SIGNING_KEY_FILE') && rootProject.f
 
 android {
     namespace "org.fossasia.badgemagic"
-    compileSdk flutter.compileSdkVersion
+    compileSdk 35  // Changed from flutter.compileSdkVersion to explicit 35
     ndkVersion "27.0.12077973"
 
     compileOptions {
@@ -41,8 +41,8 @@ android {
         applicationId "org.fossasia.badgemagic"
         // You can update the following values to match your application needs.
         // For more information, see: https://docs.flutter.dev/deployment/android#reviewing-the-gradle-build-configuration.
-        minSdkVersion 21
-        targetSdkVersion flutter.targetSdkVersion
+        minSdkVersion 21  // Already correct, keeping as is
+        targetSdkVersion 35  // Changed from flutter.targetSdkVersion to explicit 35
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
     }
@@ -78,4 +78,4 @@ android {
 
 flutter {
     source '../..'
-}
+}

android/app/src/main/AndroidManifest.xml

@@ -1,66 +1,88 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Bluetooth LE feature declaration -->
+    <uses-feature 
+        android:name="android.hardware.bluetooth_le" 
+        android:required="false"/>
+
+    <!-- Internet permission -->
+    <uses-permission android:name="android.permission.INTERNET" />
+
+    <!-- Android 12+ Bluetooth permissions -->
+    <uses-permission 
+        android:name="android.permission.BLUETOOTH_SCAN" 
+        android:usesPermissionFlags="neverForLocation"/>
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
+
+    <!-- Legacy Bluetooth permissions for Android 11 and lower -->
+    <uses-permission 
+        android:name="android.permission.BLUETOOTH" 
+        android:maxSdkVersion="30"/>
+    <uses-permission 
+        android:name="android.permission.BLUETOOTH_ADMIN" 
+        android:maxSdkVersion="30"/>
+    <uses-permission 
+        android:name="android.permission.ACCESS_FINE_LOCATION" 
+        android:maxSdkVersion="30"/>
+
+    <!-- Legacy location permission for Android 9 and lower -->
+    <uses-permission 
+        android:name="android.permission.ACCESS_COARSE_LOCATION" 
+        android:maxSdkVersion="28"/>
+
     <application
         android:label="Badge Magic"
         android:name="${applicationName}"
-        android:icon="@mipmap/ic_launcher">
+        android:icon="@mipmap/ic_launcher"
+        android:allowBackup="false">
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
-            android:windowSoftInputMode="adjustResize">
+            android:windowSoftInputMode="adjustResize"
+            android:enableOnBackInvokedCallback="true">
+
             <!-- Specifies an Android theme to apply to this Activity as soon as
                  the Android process has started. This theme is visible to the user
                  while the Flutter UI initializes. After that, this theme continues
                  to determine the Window background behind the Flutter UI. -->
             <meta-data
               android:name="io.flutter.embedding.android.NormalTheme"
-              android:resource="@style/NormalTheme"
-              />
+              android:resource="@style/NormalTheme" />
+
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+
         <!-- Don't delete the meta-data below.
              This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
         <meta-data
             android:name="flutterEmbedding"
             android:value="2" />
     </application>
+
     <!-- Required to query activities that can process text, see:
          https://developer.android.com/training/package-visibility?hl=en and
          https://developer.android.com/reference/android/content/Intent#ACTION_PROCESS_TEXT.
-
+         
          In particular, this is used by the Flutter engine in io.flutter.plugin.text.ProcessTextPlugin. -->
     <queries>
         <intent>
             <action android:name="android.intent.action.PROCESS_TEXT"/>
             <data android:mimeType="text/plain"/>
         </intent>
         <intent>
-            <action android:name="android.support.customtabs.action.CustomTabsService" />
+            <action android:name="androidx.browser.customtabs.action.CustomTabsService" />
         </intent>
         <intent>
             <action android:name="android.intent.action.VIEW" />
             <category android:name="android.intent.category.BROWSABLE" />
             <data android:scheme="https" />
         </intent>
     </queries>
-    <!--  Tell Google Play Store that your app uses Bluetooth LE
-     Set android:required="true" if bluetooth is necessary  -->
-<uses-feature android:name="android.hardware.bluetooth_le" android:required="false"/>
-<uses-permission android:name="android.permission.INTERNET" />
-<!--  New Bluetooth permissions in Android 12
-https://developer.android.com/about/versions/12/features/bluetooth-permissions  -->
-<uses-permission android:name="android.permission.BLUETOOTH_SCAN" android:usesPermissionFlags="neverForLocation"/>
-<uses-permission android:name="android.permission.BLUETOOTH_CONNECT"/>
-<!--  legacy for Android 11 or lower  -->
-<uses-permission android:name="android.permission.BLUETOOTH" android:maxSdkVersion="30"/>
-<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" android:maxSdkVersion="30"/>
-<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" android:maxSdkVersion="30"/>
-<!--  legacy for Android 9 or lower  -->
-<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" android:maxSdkVersion="28"/>
-</manifest>
+</manifest>