Check Nullability of OCS Remote Operation

[alperozturk96]

getServerResponse function may return null value. Library must handle nullable value to potential prevent crashes.

[codecov]

Codecov Report

Merging #1289 (eec0e57) into master (012db19) will increase coverage by 3.72%.
The diff coverage is 58.44%.

❗ Current head eec0e57 differs from pull request most recent head 92002cc. Consider uploading reports for the commit 92002cc to get more accurate results

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1289      +/-   ##
============================================
+ Coverage     48.57%   52.30%   +3.72%     
- Complexity      977      978       +1     
============================================
  Files           200      192       -8     
  Lines          7697     7114     -583     
  Branches        989      949      -40     
============================================
- Hits           3739     3721      -18     
+ Misses         3438     2863     -575     
- Partials        520      530      +10     

Files	Coverage Δ
...ncloud/android/lib/resources/OCSRemoteOperation.kt	100.00% <100.00%> (ø)
...ctEditingObtainListOfTemplatesRemoteOperation.java	62.96% <71.42%> (-5.04%)	⬇️
...ectediting/DirectEditingObtainRemoteOperation.java	60.00% <75.00%> (-3.64%)	⬇️
...esources/users/ConvertAppTokenRemoteOperation.java	73.91% <60.00%> (-7.91%)	⬇️
...es/users/GetPredefinedStatusesRemoteOperation.java	55.00% <60.00%> (-10.00%)	⬇️
.../lib/resources/users/GetStatusRemoteOperation.java	60.86% <60.00%> (-7.32%)	⬇️
...s/dashboard/DashboardListWidgetsRemoteOperation.kt	65.00% <40.00%> (-12.78%)	⬇️
...ces/groupfolders/GetGroupfoldersRemoteOperation.kt	60.00% <40.00%> (-8.97%)	⬇️
...b/resources/profile/GetHoverCardRemoteOperation.kt	55.55% <62.50%> (-9.83%)	⬇️
...ashboard/DashboardGetWidgetItemsRemoteOperation.kt	65.38% <42.85%> (-12.88%)	⬇️
... and 2 more

... and 42 files with indirect coverage changes

[github-actions]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[github-actions]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[alperozturk96]

@tobiasKaminsky Why I am getting this error in "ci/drone/pr" phase, have any idea?

"Failed to wait for server"

[github-actions]

SpotBugs

Category	Base	New
Bad practice	35	35
Correctness	34	34
Dodgy code	26	26
Internationalization	6	6
Malicious code vulnerability	49	49
Multithreaded correctness	3	3
Performance	8	8
Total	161	161

[nextcloud-android-bot]

master-IT test failed: https://www.kaminsky.me/nc-dev/library-integrationTests/2840-IT-master-15-18/debug/