Convert MarkerIconFactory and test to Kotlin

[JSunde]

Fixes #

@shobhitagarwal1612, @gino-m PTAL?

[JSunde]

/gcbrun

[JSunde]

/gcbrun

[JSunde]

/gcbrun

[codecov-commenter]

Codecov Report

Merging #1109 (1e0a9a2) into master (983c1ab) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1109      +/-   ##
============================================
- Coverage     27.80%   27.78%   -0.02%     
  Complexity      803      803              
============================================
  Files           298      298              
  Lines          8168     8166       -2     
  Branches        346      346              
============================================
- Hits           2271     2269       -2     
  Misses         5782     5782              
  Partials        115      115              

Impacted Files	Coverage Δ
...d/com/google/android/gnd/ui/MarkerIconFactory.java
gnd/com/google/android/gnd/ui/MarkerIconFactory.kt	90.90% <0.00%> (ø)

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