This paves the way for updates to filter and layout properties to trigger a source reload, without each SDK having to participate in the implementation.
[android] #5610 - Adjusted public api after discussion
[android] #5610 - added jni binding for NativeMapView#getLayer
[android] #5610 - Added initial test Activity
[android] #5610 - Started on NativePeer implementation for Layer
[android] #5610 - replaced low-level jni code with high-level for native getLayer
[android] 5610 - completed basic layer peer class - constructible from java and c++
[android] #5610 - removed reference that was redundant and causing the finalizer exception
[android] #5610 - Added a property peer
[android] #5610 - added value type to do type conversions - wip
[android] #5610 - simplified property conversion approach - wrapped value with jenv
[android] #5610 - added some more value conversions
[android] #5610 - Finished conversion for basic types
[android] #5610 - allow color's to be set as either an android color int or a String to support all formats in the spec
[android] #5610 - encode color ints as rgba to retain alpha channel
[android] #5610 - recalculate classes after paint property
[android] #5610 - more examples
[android] #5610 - fixed the example
[android] #5610 - cleaned up example code before continueing
[android] #5610 - added layout property example
[android] #5610 - set visibility on layer
[android] #5610 - added removeLayer and example
[android] #5610 - added more type conversions
[android] #5610 - Started on peer classes for layer implementations - WIP
[android] #5610 - First complete layer subclass peer implementation
[android] #5610 - added a little bit of structure before adding the other layer types
[android] #5610 - generate the c++ headers from the style spec
[android] #5610 - make sure the visibility is set as a string
[android] #5610 - Generate c++ layer peer class implementations from the style spec
[android] #5610 - generate java layer peer classes
[android] #5610 - cleanup comments
[android] #5610 - register all c++ peer classes with jni
[android] #5610 - addLayer
[android] #5610 - comment out broken case
[android] #5610 - Sources api - very much WIP
[android] 5610 - GeoJson source implementation and geojson conversion
[android] #5610 - cleanup add source/layer example a bit
[android] #5610 - initial filter api
[android] #5610 - Added filter api on the relevant Layer classes
[android] #5610 - raster layer is not filterable
[android] #5610 - actually make it compile
[android] #5610 - completed filter implementation
[android] #5610 - Vector and Raster Source + examples
[android] #5610 - removed superfluous interface, moved filters to the correct package
[android] #5610 - fixed comments
[android] #5610 - moved tests to the right package
[android] #5610 - hide difference between paint and layout properties in public api, make more performant set method for proeprties
[android] #5610 - fix rebase issue
