AC-618: Revamp Settings Page

[deepak140596]

Description of what I changed

• Removed Recycler view for inflating settings rows
• Configured and used ConstraintLayout
• Less lines will be needed to add a new settings to page
• Used Material design for settings.
• Added Rate Us feature to rate the app on Playstore

Issue I worked on

JIRA Issue: https://issues.openmrs.org/browse/AC-618

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.

[codecov-io]

Codecov Report

Merging #604 into master will increase coverage by 0.03%.
The diff coverage is 4.44%.

@@            Coverage Diff             @@
##           master     #604      +/-   ##
==========================================
+ Coverage   14.36%   14.39%   +0.03%     
==========================================
  Files         185      184       -1     
  Lines        8575     8556      -19     
  Branches      751      746       -5     
==========================================
  Hits         1232     1232              
+ Misses       7266     7247      -19     
  Partials       77       77

Impacted Files	Coverage Δ
...openmrs/mobile/utilities/ApplicationConstants.java	0% <ø> (ø)	⬆️
...s/mobile/activities/settings/SettingsFragment.java	0% <0%> (ø)	⬆️
.../mobile/activities/settings/SettingsPresenter.java	76.47% <100%> (ø)	⬆️

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[deepak140596]

[f4ww4z]

Thanks for the PR @deepak140596 , please address my comments.

[f4ww4z]

Got some more comments after testing thoroughly.