[NAVBAR] NavBarTitleImage not centred with backButtonImage on Android

[arribbar]

Version

Tell us which versions you are using:

• react-native-router-flux v4.?.? (v3 is not supported) v4.0.0-beta22
• react-native v0.47.1

Expected behaviour

• NavBarTitleImage is always centred

Actual behaviour

• It works perfectly on iOS but not on Android
• NavBarTitleImage is centred but when backButtonImage is displayed, NavBarTitleImage is moved on the right
• Using renderNavTitle does the same

Steps to reproduce

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

1. Create a navBarTitleImage
2. Go to a scene with back button
3. NavBarTitleImage is not centred

[aksonov]

Please check latest master and PR #2491 (I've just merged it). Unfortunately I'm working on ios app only.

[aksonov]

Duplicate of #2467