CAPTURE_AUDIO_OUTPUT not asked for permission at runtime

Question

im trying to record sound from dictaphone but on android 6+ i get permission error. I add code for asking permission (have 3 permissions for ask ) 2 work but CAPTURE_AUDIO_OUTPUT show error. Its just not ask me to grant permission. In logs its just "not granted" Any one know in what problem ?

 public static boolean PermissionCheck(Activity context, String permission, int code) {
        boolean state = false;
        int permissionCheck = ContextCompat.checkSelfPermission(context,
                permission);
        if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(context, new String[]{permission}, code); // define this constant yourself
        } else {
            // you have the permission
            return true;
        }
        return state;
    }

case CAPTURE_AUDIO_OUTPUT_CONSTANT: {
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Logger.e("CAPTURE PERMISSION GRANTED");
                    INIT();
                } else {
                    Logger.e("CAPTURE PERMISSION NOT GRANTED");
                    finish();
                }
                return;
            }

error

W/PackageManager: Not granting permission android.permission.CAPTURE_AUDIO_OUTPUT to package blabla_package (protectionLevel=18 flags=0x3848be46)

in manifest

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

[UPD] After a lot of tries and researches i now can answer : Thank to google , now we cant record calls. Its possible only if using C code and NDK .

Answer 1

CAPTURE_AUDIO_OUTPUT is not a dangerous permission and so does not work with the runtime permission system. CAPTURE_AUDIO_OUTPUT has android:protectionLevel="signature|privileged", so it can only be held by apps that are installed on the privileged (a.k.a., system) partition or are signed by the platform signing key.