AC-809 Create allergy based on server configuration

[rishabh-997]

Description of what I changed

Issue I worked on

JIRA Issue: https://issues.openmrs.org/browse/AC-809

Checklist: I completed these to help reviewers :)

• My pull request only contains ONE single commit
  (the number above, next to the 'Commits' tab is 1).

• I have added tests to cover my changes. (If you refactored
  existing code that was well tested you do not have to add tests)

• All new and existing tests passed.

• My pull request is based on the latest changes of the master branch.

[rishabh-997]

I am creating PR to keep a check on Travis errors for each commit. Will finalize this PR by tomorrow morning

[rishabh-997]

Meanwhile UI. I am reading blogs on how to create [chips](https://developer.android.com/reference/com/google/android/material/chip/Chip)

[f4ww4z]

@rishabh-997 To make this feature easier to see, you should modify the floating action button on the bottom right so that when going to the allergy tab it is changed to a + button for creating a new allergy. See this animation for example.

[codecov-commenter]

Codecov Report

Merging #796 into master will decrease coverage by 0.42%.
The diff coverage is 0.58%.

@@            Coverage Diff             @@
##           master     #796      +/-   ##
==========================================
- Coverage   13.95%   13.52%   -0.43%     
==========================================
  Files         229      238       +9     
  Lines        9329     9632     +303     
  Branches      903      924      +21     
==========================================
+ Hits         1302     1303       +1     
- Misses       7921     8223     +302     
  Partials      106      106              

Impacted Files	Coverage Δ
...ivities/addeditallergy/AddEditAllergyActivity.java	0.00% <0.00%> (ø)
...ivities/addeditallergy/AddEditAllergyFragment.java	0.00% <0.00%> (ø)
...vities/addeditallergy/AddEditAllergyPresenter.java	0.00% <0.00%> (ø)
...ivities/addeditpatient/AddEditPatientFragment.java	0.00% <0.00%> (ø)
...s/mobile/activities/dialog/CustomPickerDialog.java	0.00% <0.00%> (ø)
...ies/patientdashboard/PatientDashboardActivity.java	0.00% <0.00%> (ø)
...enmrs/mobile/api/repository/AllergyRepository.java	25.64% <0.00%> (-14.36%)	⬇️
...obile/api/workers/allergy/DeleteAllergyWorker.java	0.00% <0.00%> (ø)
...n/java/org/openmrs/mobile/models/AllergenCreate.kt	0.00% <0.00%> (ø)
...in/java/org/openmrs/mobile/models/AllergyCreate.kt	0.00% <0.00%> (ø)
... and 15 more

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[rishabh-997]

You can reach the activity through the floating action button in the dashboard.

[rishabh-997]

1. No Duplicates can be added in chips
2. Scroll view added in case many chips are added

[rishabh-997]

Not added in strings.xml or ApplicationConstants.kt since I will remove it in the update-allergy PR.

[f4ww4z]

LGTM @rishabh-997

[rishabh-997]

I think there has been some error while mierging as lastest commit history shows all 10 commits I made in this PR... @f4ww4z sir