v3.2.0: OpenTracks

Changes:
- Removed Widget
- Introduced material design icons
- Removed snowboarding and skiing (need new icons)

Bugfix:
- Fixed search functionality

Developer:
- Fixed (some) test cases
- Removed unused parcelable functionality
- Major cleanup and reformatting
- Do not use broadcast for app to widget communication
- stats_content.xml does not include other files