[RNMobile] Replace Slider

[lukewalczak]

Description

I added within gutenberg-mobile new library react-native-slider which is going to replace Slider from react-native which will be deprecated soon and what's more have a bug on ios ~13.

Ref to gb-mobile:wordpress-mobile/gutenberg-mobile#1620
Ref to WordPress-Android:wordpress-mobile/WordPress-Android#10871
Ref to WordPress-iOS:wordpress-mobile/WordPress-iOS#13019

How has this been tested?

I was testing it in WordPress-Android, WordPress-iOS and also within a playground.

1. Add Spacer block on mobile
2. Play with Slider

• I suggest you also to set small range eg. minValue=0, maxValue=20 in RangeCell to check if Slider is not jumping

Screenshots

Types of changes

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR. .

[pinarol]

I suggest you also to set small range eg. minValue=0, maxValue=20 in RangeCell to check if Slider is not jumping

Actually this is a pretty important test case since that jumpiness on iOS 13.x is the main reason we wanted to make this change.

[pinarol]

Could you also add the gif that demonstrates the odd behavior @lukewalczak ? It is not clear for reviewers what we are fixing.

[lukewalczak]

Sure! Weird behavior:

[etoledom]

Approved iOS side via wordpress-mobile/gutenberg-mobile#1620 (review)

[marecar3]

Tested on Android and it's working good!
LGTM!