Close the dialog activity when user click cancel or background

Bug: 241346100
Test: local test
Change-Id: Id9d931fc8b74ef566ffe3c6135aaf433cd9f770b

src/com/android/settings/bluetooth/BluetoothBroadcastDialog.java

@@ -19,6 +19,7 @@ package com.android.settings.bluetooth;
 import android.app.Dialog;
 import android.app.settings.SettingsEnums;
 import android.content.Context;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
 import android.text.TextUtils;
@@ -27,6 +28,7 @@ import android.view.View;
 import android.widget.Button;
 import android.widget.TextView;
 
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AlertDialog;
 
 import com.android.settings.R;
@@ -128,6 +130,12 @@ public class BluetoothBroadcastDialog extends InstrumentedDialogFragment {
         return SettingsEnums.DIALOG_LE_AUDIO_BROADCAST;
     }
 
+    @Override
+    public void onCancel(@NonNull DialogInterface dialog) {
+        dismiss();
+        getActivity().finish();
+    }
+
     private void launchFindBroadcastsActivity() {
         Bundle bundle = new Bundle();
         bundle.putString(KEY_DEVICE_ADDRESS, mDeviceAddress);