android back button move the app to forground mode

[roeib]

Version

Tell us which versions you are using:

• react-native-router-flux v4.0.0-beta.31
• react-native v0.55.4

Expected behaviour

when press back button make Actions.pop()

Actual behaviour

android back button move the app to forground mode

Steps to reproduce

For non-obvious bugs, please fork this component, modify Example project to reproduce your issue and include link here.
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[daviscabral]

@roeib Please try the most recent version, in case that still does not work, provide an example (better if using one of the ones provided in the repository) so I can reproduce it here and help you.