[SDK] [Android] Release v4.0.2

Changelog:

• Add necessary ProGuard rules to protect FCM/HCM push service modules discovery
• Miscellaneous

Do not forget to look at v4.0.0 changelog and breaking changes.

Version 4 brings you:

• In-app messaging
• Attribute events to the last clicked notification. Lets you view events generated by a particular notification in your dashboard.
• Count delivered notifications and report it to your dashboard.
• Detect devices that no longer receive notifications
• Segment users depending on app usage and real-time presence.
• Drop com.loopj.android:android-async-http:1.4.9 in favor of com.squareup.okhttp3:okhttp:3.14.9
• Reduce number of network calls
• Fix spurious "App Open" events tracked on some background activities
• For better privacy, WonderPush no longer collects events from non-subscribers. If you think you have a use-case that would justify collecting data for non-subscribers, please contact us.

Upgrading:

Follow our upgrade guide.