Disable nightly popup

[bmarty]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

sign in to firebase app inside the app does not work properly, so it is annoying to have a popup, even only once a day.

This PR disables the popup and add a section in the preference (Advanced settings), only visible in nightly builds, to be able to try to upgrade (and sign in) manually from there.

Motivation and context

Do not annoy the user with a non-working feature.

Screenshots / GIFs

Sign in issue	New setting

Tests

• NA

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes has been tested on an Android device or Android emulator with API 21
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/vector-im/element-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR
• If you have modified the screen flow, or added new screens to the application, you have updated the test UiAllScreensSanityTest.allScreensTest()

[bmarty]

@BillCarsonFr once merged, you may want to add other package(s) to this list.

[ElementBot]

	Warnings
⚠️	Please add a changelog. See instructions here

Generated by 🚫 dangerJS against 0d12dbb

[ElementBot]

	Warnings
⚠️	Please add a changelog. See instructions here

Generated by 🚫 dangerJS against 988afa4

[ganfra]

Thanks for this!

[ElementBot]

	Warnings
⚠️	Please add a reviewer to your PR.

Generated by 🚫 dangerJS against c9c5483

[sonarqubecloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

21.4% Coverage
0.0% Duplication