Add feature flag for polls

[Florian14]

Add a feature flag in the developer settings for Polls feature

[github-actions]

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[ganfra]

One remark otherwise LGTM

[codecov]

Codecov Report

Patch coverage: 58.64% and no project coverage change.

Comparison is base (efdfe15) 56.89% compared to head (ff4703b) 56.90%.
Report is 1 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff            @@
##           develop    #1064    +/-   ##
=========================================
  Coverage    56.89%   56.90%            
=========================================
  Files          999     1014    +15     
  Lines        25438    25750   +312     
  Branches      5123     5188    +65     
=========================================
+ Hits         14474    14652   +178     
- Misses        8713     8816   +103     
- Partials      2251     2282    +31     

Files Changed	Coverage Δ
...ndroid/features/messages/impl/MessagesPresenter.kt	82.69% <0.00%> (-0.54%)	⬇️
...eatures/messages/impl/actionlist/ActionListView.kt	58.77% <0.00%> (-0.26%)	⬇️
...meline/components/event/TimelineItemContentView.kt	72.91% <0.00%> (-6.63%)	⬇️
...tils/messagesummary/MessageSummaryFormatterImpl.kt	46.66% <0.00%> (-3.34%)	⬇️
...ndroid/features/poll/impl/DefaultPollEntryPoint.kt	0.00% <0.00%> (ø)
...tformatter/impl/DefaultRoomLastMessageFormatter.kt	95.16% <0.00%> (-1.57%)	⬇️
...entformatter/impl/DefaultTimelineEventFormatter.kt	0.00% <0.00%> (ø)
...s/featureflag/impl/BuildtimeFeatureFlagProvider.kt	0.00% <0.00%> (ø)
...ies/matrix/api/timeline/item/event/EventContent.kt	84.73% <0.00%> (-6.26%)	⬇️
...t/android/libraries/matrix/impl/poll/PollAnswer.kt	0.00% <0.00%> (ø)
... and 25 more

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

0.0% Coverage
0.0% Duplication