我的flutter应用程序没有安装在Android 12版本上。我尝试使用android:exported，但没有任何效果。它显示了这种类型的错误-

✓  Built build/app/outputs/flutter-apk/app-debug.apk.
Installing build/app/outputs/flutter-apk/app.apk...                 3.3s
Error: ADB exited with exit code 1
Performing Streamed Install

adb: failed to install /Users/abir/Documents/Office
Work/MediMate-App-Old-Version/build/app/outputs/flutter-apk/app.apk: Failure
[INSTALL_PARSE_FAILED_MANIFEST_MALFORMED: Failed parse during installPackageLI:
/data/app/vmdl489268217.tmp/base.apk (at Binary XML file line #125):
io.flutter.plugins.firebasemessaging.FlutterFirebaseMessagingService: Targeting S+ (version 31 and above)
requires that an explicit value for android:exported be defined when intent filters are present]
Error launching application on sdk gphone64 x86 64.

这是我的AndroidManifest.xml文件

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="care.example.health">
    <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <!-- The Agora SDK requires Bluetooth permissions in case users are using Bluetooth devices.-->
    <uses-permission android:name="android.permission.BLUETOOTH" />

    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
    <uses-permission android:name="android.permission.VIBRATE" />

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
   <application
        android:label="example"
        android:name="${applicationName}"
        android:icon="@mipmap/ic_launcher">
        <activity
            android:exported="true"
            android:name=".MainActivity"
            
            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">
            <!-- 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"
              />
            <intent-filter 
                android:exported="false">
                <action android:name="android.intent.action.MAIN"/>
                <category android:name="android.intent.category.LAUNCHER"/>
            </intent-filter>
            <intent-filter 
                android:exported="false">
                <action android:name="FLUTTER_NOTIFICATION_CLICK" />
                <category android:name="android.intent.category.DEFAULT" />
            </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>
</manifest>

我错过了什么？