title: Android Studio does not see the "android" package from the library file
body: <p>My MainActivity.java file starts like this:</p>
  <pre><code>package com.example.testble2;
  
  import android.Manifest;
  import android.app.AlertDialog;
  import android.bluetooth.BluetoothAdapter;
  import android.content.BroadcastReceiver;
  import android.content.Context;
  import android.content.DialogInterface;
  import android.content.Intent;
  import android.content.IntentFilter;
  import android.content.pm.PackageManager;
  import android.location.LocationManager;
  import android.os.Build;
  import androidx.annotation.NonNull;
  import androidx.appcompat.app.AppCompatActivity;
  </code></pre>
  <p>In the same project, the blessed module is created, with the BluetoothCentralManager.java file, which starts like this:</p>
  <pre><code>package com.example.blessed;
  
  import android.Manifest;
  import android.bluetooth.BluetoothAdapter;
  import android.bluetooth.BluetoothDevice;
  import android.bluetooth.le.BluetoothLeScanner;
  import android.bluetooth.le.ScanCallback;
  import android.bluetooth.le.ScanFilter;
  import android.bluetooth.le.ScanResult;
  import android.bluetooth.le.ScanSettings;
  import android.content.BroadcastReceiver;
  import android.content.Context;
  import android.content.Intent;
  import android.content.IntentFilter;
  import android.content.pm.PackageManager;
  import android.os.Build;
  import android.os.Handler;
  import android.os.Looper;
  import android.os.ParcelUuid;
  </code></pre>
  <p>The problem is that in the BluetoothCentralManager.java file all import android.* directives are marked in red with the message &quot;Cannot resolve symbol&quot;. Please help me to solve this problem.</p>