Try to workaround a timeline pagination deadlock

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

Added a Mutex to avoid several pagination runs at the same time. This seems to workaround the issue.

Motivation and context

Screenshots / GIFs

Tests

• Step 1
• Step 2
• Step ...

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-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/element-hq/element-x-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

[ElementBot]

	Warnings
⚠️	features/ftue/impl/src/main/kotlin/io/element/android/features/ftue/impl/state/DefaultFtueService.kt#L42 - The import 'kotlinx.coroutines.runBlocking' is unused.

Generated by 🚫 dangerJS against 7b73f17

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.96%. Comparing base (0ed4109) to head (7b73f17).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2824   +/-   ##
========================================
  Coverage    73.96%   73.96%           
========================================
  Files         1530     1530           
  Lines        36549    36549           
  Branches      7075     7075           
========================================
  Hits         27034    27034           
  Misses        5810     5810           
  Partials      3705     3705           

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[ganfra]

@jmartinesp so from what I've seen, this is not coming from the pagination and the main point has been fixed by https://github.com/matrix-org/matrix-rust-components-kotlin/releases/tag/sdk-v0.2.18 updates (new suspending method).

[jmartinesp]

Perfect, thanks for checking this! I'm closing the PR.