Closes #3264, disable options menu for null media from provider

[ashishkumar468]

Description (required)

Fixes NPE in MediaDetailFragment #3264

What changes did you make and why?
Disable options menu for null media from Provider

Tests performed (required)

Tested {ProdDebug} on {One Plus 3} with API level {27}.

[tests-checker]

Could you please add tests to make sure this change works as expected?

[codecov-io]

Codecov Report

Merging #3265 into master will decrease coverage by <.01%.
The diff coverage is 0%.

@@            Coverage Diff            @@
##           master   #3265      +/-   ##
=========================================
- Coverage    6.54%   6.53%   -0.01%     
=========================================
  Files         270     270              
  Lines       11613   11626      +13     
  Branches      906     906              
=========================================
  Hits          760     760              
- Misses      10793   10806      +13     
  Partials       60      60

Impacted Files	Coverage Δ
...ee/nrw/commons/media/MediaDetailPagerFragment.java	0% <0%> (ø)	⬆️

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