[BUG] - AlertDialog can always be cancelled, which leads to a black CropActivity #334

• Lib Version 4.1.0

Describe the bug
When extending CropImageActivity, the AlertDialog is cancellable if touched outside. If the user accidentally touches outside the dialog, it is left into a black CropImageActivity and the dialog never comes back. If trying to override the method after my CropImageActivity extension's onCreate:

override fun showImageSourceDialog(openSource: (Source) -> Unit) {
        AlertDialog.Builder(this)
            .setTitle("sample title")
            .setCancellable(false) // Does not work :(
            .setItems(
                arrayOf(
                    getString(R.string.pick_image_camera),
                    getString(R.string.pick_image_gallery),
                )
            ) { _, position -> openSource(if (position == 0) Source.CAMERA else Source.GALLERY) }
            .show()
    }

...no custom title is assigned, plus the dialog is still cancellable even after told otherwise. The debugger never enters this method.

To Reproduce
Steps to reproduce the behavior:

1. Create a new CropImageActivity just as shown in the documentation.
2. Touch outside the dialog once it appears.

Expected behavior
The dialog should not be cancelled on touch outside.

Media
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Smartphone (please complete the following information):

• Device: Huawei P40 Pro, Nexus 5 (emulated).
• OS: Android 10, Android 12 respectively.