Increase session manager test coverage

[onurays]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

This PR aims to increase unit test coverage of the new session manager feature by including missing unit tests for business classes.

Motivation and context

Screenshots / GIFs

Tests

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()

[ElementBot]

	Warnings
⚠️	Please add a changelog. See instructions here

Generated by 🚫 dangerJS against fcac184

[mnaturel]

There is missing tabs on this comment.

[mnaturel]

Thanks for adding unit tests! I have just added a minor comment about code alignement style.

[ElementBot]

	Warnings
⚠️	Please add a reviewer to your PR.

Generated by 🚫 dangerJS against 2ddc3b6

[ElementBot]

	Fails
🚫	node failed.

Log

Error:  Error: Could not find the Dangerfile at ./tools/danger/dangerfile-lint.js - does a file exist at danger/dangerfile-lint.js in ./tools?.
    at /usr/src/danger/distribution/platforms/GitHub.js:166:27
    at step (/usr/src/danger/distribution/platforms/GitHub.js:44:23)
    at Object.next (/usr/src/danger/distribution/platforms/GitHub.js:25:53)
    at fulfilled (/usr/src/danger/distribution/platforms/GitHub.js:16:58)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)
danger-results://tmp/danger-results-0b1daa64.json

Generated by 🚫 dangerJS against 2ddc3b6

[ElementBot]

	Warnings
⚠️	Please add a reviewer to your PR.

Generated by 🚫 dangerJS against 2ddc3b6

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
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No Coverage information
0.0% Duplication