Only apply Bugsnag to gplay build flavor (#88)

* wip

* Setup bugsnag only in gplay builds.

* Bugsnag does not support uploading mapping files or build information from library modules. This should be done from the application module which produces your APK instead.

* Only apply Bugsnag plugin for the right flavors.

* Run unit tests in debug, otherwise we run issues requiring api keys in the env

app/src/main/AndroidManifest.xml

@@ -86,10 +86,6 @@
             android:name="androidx.startup.InitializationProvider"
             android:authorities="${applicationId}.androidx-startup"
             tools:node="remove" />
-
-        <meta-data
-            android:name="com.bugsnag.android.API_KEY"
-            android:value="${bugsnagApiKey}" />
     </application>
 
 </manifest>