* [android] - add style loading callback that is invoked when a style finishes loading.
* fixup language + add support for adding a callback when invoking setStyle with the default styles.
* Add symbol dds attributes and adapt style code generation
* Update to mapbox-gl-js/master
* Refactor SymbolFeature as a subclass of GeometryTileFeature
Prepares for enabling DDS on symbol paint properties by allowing the
SymbolFeatures, which we keep around after constructing SymbolLayout,
to be used in evaluating data-driven paint properties later in the
layout process.
* Draft approach for splitting icon/text paint properties
The `Program` types are set up to bind GL attributes to each of the
data-driven paint properties specified in the `PaintProperties` type
provided. Since `SymbolPaintProperties` specifies both `Text*` and
`Icon*` properties, the symbolIcon, symbolIconSDF, and symbolGlyph
programs each attempt to bind roughly double the number of attributes
that they actually need.
This change addresses this by:
- Adding the more specific `IconPaintProperties` and `TextPaintProperties` types, which are subsets of the full `SymbolPaintProperties`.
- The symbol layer continues to use its `SymbolPaintProperties paint` member to track layer property state, but it provides helpers that construct objects of each the specific `{Icon,Text}PaintProperties::Evaluated` type, for use by the painter.
- The three symbol programs instantiate `Program<>` using the appropriate `{Icon,Text}PaintProperties` type.
* check in generated style code
* Populate paint buffers for symbol DDS properties
* Address first round of review comments
* Refactor VectorTile{Layer,Feature} to explicitly share data
* Update submodule
* [android] - zoom to at least 2 when tracking is enabled, introduce interface for zoom invalidation, simplify example
* fixup unit test, added test for new interface + focal point interface
* adds checkstyle to CI
* fixed gradlew path
* resolved testapp checkstyle violations
* added back mapboxMap variable for test
* checkstyle annotations
* checkstyle SDK round 1
* maps package checkstyle
* rest of SDK checkstyle
* checkstyle gesture library
* checkstyle test
* finished rest of test checkstyle
* resolved all checkstyle errors
* fixed class name
* removed old test file
* fixed camera postion test
* fixed native crash
