feat: added network connectivity handling

[Mokto]

[codecov[bot]]

Codecov Report

Merging #162 into develop will decrease coverage by 2.28%. The diff coverage is 46.15%.

@@             Coverage Diff             @@
##           develop     #162      +/-   ##
===========================================
- Coverage    75.04%   72.75%   -2.29%     
===========================================
  Files          187      195       +8     
  Lines         1222     1248      +26     
  Branches       226      227       +1     
===========================================
- Hits           917      908       -9     
- Misses         280      315      +35     
  Partials        25       25

Impacted Files	Coverage Δ
src/CodePush.ts	100% <ø> (ø)
src/redux/contacts/reducer.ts	20.58% <ø> (ø)	:arrow_up:
src/pages/Contacts/Navbar/Navbar.ios.tsx	0% <0%> (ø)	:arrow_up:
src/redux/network/operations.ts	0% <0%> (ø)
src/pages/Contacts/Navbar/Navbar.android.tsx	0% <0%> (ø)	:arrow_up:
src/containers/NetworkStatus/NetworkStatus.tsx	0% <0%> (ø)
src/models/index.ts	0% <0%> (ø)	:arrow_up:
src/redux/rootReducer.ts	30% <0%> (-30%)	:arrow_down:
src/components/Navbar/Navbar.android.tsx	100% <100%> (ø)	:arrow_up:
src/components/Navbar/Navbar.ios.tsx	100% <100%> (ø)	:arrow_up:
... and 24 more

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