a11y: Make isTalkbackActive() live.

[bmarty]

Content

We made the assumption that the user needs to navigate to the setting to enable or disable the talkback, but there is a way to add a talkback switch on the bottom navigation bar. So the talkback can be enabled/disabled when the application is resumed. Since the UI may render differently depending on the talkback state, we need to make the composable isTalkbackActive() backed on a mutable state.

Motivation and context

Ensure the UI is responsive regarading the talkback state.

Screenshots / GIFs

LiveAccessibilityState.mp4

Tests

• From the talkback (screen reader) setting, enable the shortcut. On my device, this is like this:

- open EXA - open a timeline - toggle the accessibility shortcut - observe that the timeline is now getting reverse when the screen reader is enabled.

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 24
• 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 title will be used in the release note, it clearly define what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[ganfra]

Good catch!

[codecov]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 80.30%. Comparing base (3a2e36b) to head (ba3e64c).
Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
...droid/libraries/ui/utils/time/IsTalkbackEnabled.kt	87.50%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #4903   +/-   ##
========================================
  Coverage    80.30%   80.30%           
========================================
  Files         2155     2155           
  Lines        57305    57312    +7     
  Branches      7220     7220           
========================================
+ Hits         46020    46026    +6     
- Misses        8836     8837    +1     
  Partials      2449     2449           

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