Add these functions in your PickerUtilicty class. It will always open system default camera no matter what camera set as default.

Utils

private void captureImageFromCamera() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        File path = AppFolders.getImageFilePath();
        if (!path.exists()) {
            path.mkdirs();
        }
        File file = new File(AppFolders.getRandomImageFilePath());
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            imageCaptureUri = FileProvider.getUriForFile(mContext, LWMCApplication.getInstance().getPackageName() + ".provider", getRandomFileName());
        } else {
            imageCaptureUri = Uri.fromFile(file);
        }
        String defaultCamera = getPackageCamera();
        if (!defaultCamera.isEmpty()){
            intent.setPackage(defaultCamera);
        }
        intent.putExtra("return-data", true);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,
                imageCaptureUri);
        if (mFragmentContext != null) {
            startChildActivityFragment(intent, PIC_FROM_CAMERA);
        } else {
            startChildActivity(intent, PIC_FROM_CAMERA);
        }
    }

    private String getPackageCamera(){
        String defaultCameraPackage = "";
        List<ApplicationInfo> list = getPackageManager().getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES);
        for (int n=0;n<list.size();n++) {
            if((list.get(n).flags & ApplicationInfo.FLAG_SYSTEM)==1)
            {
                Log.d("TAG", "Installed Applications  : " + list.get(n).loadLabel(getPackageManager()).toString());
                Log.d("TAG", "package name  : " + list.get(n).packageName);
                if(list.get(n).loadLabel(getPackageManager()).toString().equalsIgnoreCase("Camera")) {
                    defaultCameraPackage = list.get(n).packageName;
                    break;
                }
            }
        }
        return defaultCameraPackage;
    }