[SDK] [Android] Release v1.2.1.0

GitHub release
Integration guide

Changelog:

• Update to Google Play Services GCM 8.4.0 for better push token renewal
• Fix use of reflection without matching Proguard rules
• Reduce number of network calls in case of push token renewal and application update
• Report device country and currency
• Permit auto dropping a notification received in foreground
• Support omitting notification reception event
• Fix small mistake in influenced app open measurement
• Do not show data notifications that mimic an alert
• Fix OpenUDID setup
• Deprecate WonderPushBroadcastReceiver

Upgrading:

If you use a custom BroadcastReceiver for Handling your own notifications, as previously advised in the guide, please check your setup, and migrate to a GcmListenerService like advised from now on.