Netflix won't ask me to download Chromium OS/libwidevine

*I'm submitting a ...*
- [ ] bug report
- [ ] feature request
- [x] support request

## General information

The netflix plugin wont automatically ask me to download chromium os/libwidevine when trying to play a movie/show after initial launch

### Prerequisites

* [x] Are you running the latest version?

### Description

The netflix plugin used to automatically ask me to download chromium os/libwidevine when trying to play a movie/show after initial launch. Since then i've re-installed the android firmware on my set-top box. I then re-installed kodi and this Netflix plugin, but this time it wont popup and ask me to download chromium os/libwidevine for me. I have no idea where to get these files if i were to do it manually.

I also tried to install the plugin from the repo instead (v. 0.13.8) but that won't even let me sign in, it gives me an error for wrong credentials. But there's already a bug report posted for this.

### Steps to Reproduce

1. Launch Netflix after install
2. Sign in
3. Try to playback a movie/show

**Expected behavior:** Netflix plugin to automatically install chromium os/libwidevine when trying to play a movie/show

**Actual behavior:** Tries to load a movie/show for a second, then nothing happens. No errors.

## Context (Environment)

### Installation

* [x] I installed the plugin via zip from the Releases page
* [ ] I´m using the Netflix Repo
* [ ] I´m using a different source (Please tell which)

### Operating System

* [ ] Linux (x86/x64)
* [ ] OSX (x86/x64)
* [ ] Windows (x86/x64)
* [ ] Linux (ARM)
* [x] Android

No source file or test is identified in the report. Begin at the Netflix plugin's playback and Chromium OS/libwidevine installation entry points, reproduce the failure on Android, and collect logs; done means establishing why the prompt is absent and verifying the expected installation flow or documenting the required limitation.

Written by the indexing model from the issue text.