Update to Android O
Update to Android O

Updating com.google.android.gms:play-services-gcm too.

I'm taking a ≥10.2 version for the [10.2.1 release][1] related to
Android O changes. Such versions remove support for Gingerbread.
It requires setting minSdkVersion to at least 14.

I'm taking upto [version 11.0.4][2] to have the latest
notification-related fix while still avoiding the [version 11.2.0][3]
that imposes more constraints, with no notification-related changed.

[1]: https://developers.google.com/android/guides/releases#march_2017_-_version_1021
[2]: https://developers.google.com/android/guides/releases#june_2017_-_version_110
[3]: https://developers.google.com/android/guides/releases#august_2017_-_version_1120

wonderpush/wonderpush-android-sdk,wonderpush/wonderpush-android-sdk,wonderpush/wonderpush-android-sdk,wonderpush/wonderpush-android-sdk