Fix poll ended event rendering (PSG-1177)

[alfogrillo]

Description

This PR improves the rendering of the m.poll.end message adding always the sender information.

Before	After

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (9441f69) 12.15% compared to head (a0dbd97) 12.16%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #7402   +/-   ##
========================================
  Coverage    12.15%   12.16%           
========================================
  Files         1643     1643           
  Lines       162310   162313    +3     
  Branches     66647    66648    +1     
========================================
+ Hits         19728    19738   +10     
+ Misses      141937   141930    -7     
  Partials       645      645           

Flag	Coverage Δ
uitests	55.31% <ø> (-0.03%)	⬇️
unittests	6.01% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
Riot/Modules/Room/CellData/RoomBubbleCellData.m	0.00% <0.00%> (ø)
...ojiPicker/Data/EmojiMart/EmojiItem+EmojiMart.swift	95.34% <0.00%> (-0.31%)	⬇️
...tartLocationSharing/View/LocationSharingView.swift	57.51% <0.00%> (+0.65%)	⬆️
...tartLocationSharing/LocationSharingViewModel.swift	9.27% <0.00%> (+0.66%)	⬆️
...haringViewer/LiveLocationSharingViewerModels.swift	13.33% <0.00%> (+6.66%)	⬆️
...nSharing/MapView/View/LocationSharingMapView.swift	56.63% <0.00%> (+7.96%)	⬆️
...ionSharingViewer/StaticLocationViewingModels.swift	33.33% <0.00%> (+16.66%)	⬆️

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