feature/#1545 - LeakCanary version upgrade to 2.2
feature/#1545 - LeakCanary version upgrade to 2.2

Impacted file:
* `build.gradle` (OpenStreetMapViewer): upgraded LeakCanary version to 2.2 (from 2.0) and minor refactoring

osmdroid/osmdroid,osmdroid/osmdroid,osmdroid/osmdroid,osmdroid/osmdroid