v3.18.6: OpenTracks

Changes:
- "Show on map"-functionality via  KML instead of KMZ
- Voice announcement do not include app name
- While recording: elevation gain/loss is updated every second
- Store descriptions translated

Bufixes:
- Fixed invalid voice announcement translations

Developer:
- Android12 permissions (BLUETOOTH_SCAN)
- Android12 permissions (ACCESS_COARSE_LOCATION)
- Asserting for TrackPoints (testing)
- Removed unused translations