[android] update changelog for the v8.3.0-alpha.1 release

platform/android/CHANGELOG.md

@@ -2,11 +2,28 @@
 
 Mapbox welcomes participation and contributions from everyone.  If you'd like to do so please see the [`Contributing Guide`](https://github.com/mapbox/mapbox-gl-native/blob/master/CONTRIBUTING.md) first to get started.
 
-## master
+## 8.3.0-alpha.1 - July 31, 2019
+[Changes](https://github.com/mapbox/mapbox-gl-native/compare/android-v8.2.0...android-v8.3.0-alpha.1) since [Mapbox Maps SDK for Android v8.2.0](https://github.com/mapbox/mapbox-gl-native/releases/tag/android-v8.2.0):
+
+### Features
+ - Do not include CJK ideographs in the offline packs by default. This decreases overall offline download size but changes appereance by a default set local glyph generation [#14269](https://github.com/mapbox/mapbox-gl-native/pull/14269)
+ - Update target SDK to 28, update support library and fix gradle warnings [#15135](https://github.com/mapbox/mapbox-gl-native/pull/15135)
+ - Introduce VertexVector::extend() and use it in placement code [#15194](https://github.com/mapbox/mapbox-gl-native/pull/15194)
 
 ### Bug fixes
+ - Save location animation timestamp only when fed. Fixes an issue where external camera updates impacted location animation duration[#15265](https://github.com/mapbox/mapbox-gl-native/pull/15265)
  - Fixed flickering on style change for the same tile set [#15127](https://github.com/mapbox/mapbox-gl-native/pull/15127)
  - Fix location render/camera modes being reinitialized even when the new mode is the same [#15266](https://github.com/mapbox/mapbox-gl-native/pull/15266)
+ - Ensure default local ideographs font family is not overwrote. Fix a bug that prevented local CJK glyphs generation. The local generation is now enabled by default and the font family used for generation is set to "sans-serif. [#15253](https://github.com/mapbox/mapbox-gl-native/pull/15253)
+ - Fix int overflow issue in GridIndex [#15245](https://github.com/mapbox/mapbox-gl-native/pull/15245)
+ - Align gesture animation reason for onCameraMoveStarted [#15218](https://github.com/mapbox/mapbox-gl-native/pull/15218)
+ - Remove layers first when clearing the style, fixes unnecessary log dumps [#15191](https://github.com/mapbox/mapbox-gl-native/pull/15191)
+ - Remove unused field from icon buffer [#15189](https://github.com/mapbox/mapbox-gl-native/pull/15189)
+
+### Performance improvements
+ - Release quad data after vertex buffers are created [#15189](https://github.com/mapbox/mapbox-gl-native/pull/15189)
+ - Decrease size of SymbolBucket [#15178](https://github.com/mapbox/mapbox-gl-native/pull/15178)
+ - Avoid geometry collections copying [#15201](https://github.com/mapbox/mapbox-gl-native/pull/15201)
 
 ## 8.1.1 - July 26, 2019
 [Changes](https://github.com/mapbox/mapbox-gl-native/compare/android-v8.1.0...android-v8.1.1) since [Mapbox Maps SDK for Android v8.1.0](https://github.com/mapbox/mapbox-gl-native/releases/tag/android-v8.1.0):