[Android] Method for pausing application/Activity, and lifecycle hooks

[jaysoo]

There is a need for Android apps to pause instead of exiting completely when the user presses the back button.

Also, there should be support for lifecycle hooks similar to AppStateIOS. i.e. app resume, app pause, (app destroyed?)

I'm currently using my own module for this, but it'd be great to see this supported in core.

https://github.com/jaysoo/react-native-activity-android

Also: https://productpains.com/post/react-native/android-method-for-pausing-applicationactivity-and-lifecycle-hooks/

[facebook-github-bot]

Hey jaysoo, thanks for reporting this issue!

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[christopherdro]

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