packages/image_picker/image_picker/android/src/main/AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="io.flutter.plugins.imagepicker">
   <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

    <application>
        <provider
            android:name="io.flutter.plugins.imagepicker.ImagePickerFileProvider"
            android:authorities="${applicationId}.flutter.image_provider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/flutter_image_picker_file_paths"/>
        </provider>
    </application>
</manifest>