OSM Tile Scale Factor

[growse]

Added osmTileScaleFactor preference to allow control of how large the OSM tiles are drawn, to help with readability (#1223)

[codecov]

Codecov Report

Merging #1262 (aeee6bc) into master (2122d1a) will decrease coverage by 0.10%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master    #1262      +/-   ##
============================================
- Coverage     58.08%   57.98%   -0.11%     
- Complexity     1221     1225       +4     
============================================
  Files           171      171              
  Lines          6628     6643      +15     
  Branches        672      674       +2     
============================================
+ Hits           3850     3852       +2     
- Misses         2281     2288       +7     
- Partials        497      503       +6     

Flag	Coverage Δ
uitests	52.91% <25.00%> (-0.15%)	⬇️
unittests	14.28% <37.50%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...roid/support/preferences/SharedPreferencesStore.kt	65.21% <0.00%> (-2.97%)	⬇️
.../java/org/owntracks/android/support/Preferences.kt	79.52% <58.33%> (-0.33%)	⬇️
...org/owntracks/android/ui/map/osm/OSMMapFragment.kt	81.48% <100.00%> (+0.09%)	⬆️
...rg/owntracks/android/geocoding/GeocoderLRUCache.kt	62.50% <0.00%> (-25.00%)	⬇️
.../java/org/owntracks/android/ui/map/MapViewModel.kt	66.48% <0.00%> (-1.65%)	⬇️
.../owntracks/android/services/BackgroundService.java	43.68% <0.00%> (-0.27%)	⬇️
.../owntracks/android/services/LocationProcessor.java	34.34% <0.00%> (ø)

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