Preventing dialog from appearing if location is enabled

[cypherop]

Description (required)

Fixes #2634

What changes did you make and why?

Tests performed (required)

Tested ProdDebug on Motorola moto G5 plus with API level 24.

[codecov-io]

Codecov Report

Merging #2635 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #2635      +/-   ##
=========================================
- Coverage    2.77%   2.77%   -0.01%     
=========================================
  Files         259     259              
  Lines       12365   12373       +8     
  Branches     1116    1117       +1     
=========================================
  Hits          343     343              
- Misses      11995   12003       +8     
  Partials       27      27

Impacted Files	Coverage Δ
...e/nrw/commons/location/LocationServiceManager.java	0% <0%> (ø)	⬆️
app/src/main/java/fr/free/nrw/commons/Media.java	1.53% <0%> (-0.04%)	⬇️
...n/java/fr/free/nrw/commons/MediaDataExtractor.java	0% <0%> (ø)	⬆️
...rw/commons/mwapi/ApacheHttpClientMediaWikiApi.java	0% <0%> (ø)	⬆️
...fr/free/nrw/commons/settings/SettingsFragment.java	0% <0%> (ø)	⬆️
...ommons/contributions/ContributionsSyncAdapter.java	0% <0%> (ø)	⬆️
...fr/free/nrw/commons/media/MediaDetailFragment.java	0% <0%> (ø)	⬆️
...nrw/commons/achievements/AchievementsActivity.java	0% <0%> (ø)	⬆️

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[domdomegg]

Minor Javadoc changes requested, then I think ready to merge.