RoomsListView re-render

[diegolmello]

@RocketChat/ReactNative

• Removed unnecessary re-renders on RoomsListView

[codecov-io]

Codecov Report

Merging #304 into develop will decrease coverage by 0.82%.
The diff coverage is 25%.

@@             Coverage Diff             @@
##           develop     #304      +/-   ##
===========================================
- Coverage    60.95%   60.13%   -0.83%     
===========================================
  Files           12       12              
  Lines          146      148       +2     
  Branches        23       24       +1     
===========================================
  Hits            89       89              
- Misses          49       50       +1     
- Partials         8        9       +1

Impacted Files	Coverage Δ
app/presentation/RoomItem.js	55% <25%> (-1.9%)	⬇️

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