Update ripple polyfil to support flex on the touchable

[mlabrum]

Hey,

I found that on IOS the TouchableOpacity won't respect the child flex (where TouchableNativeFeedback seems to) and that it sometimes requires a kick to force it to flex

pre flex

after flex

(Trying to make the whole area a button)

[Salakar]

Could we not use the existing style prop to pass this along - Incase other styles other than flex are wanted? Thoughts?

[mlabrum]

the existing style prop updates the inner and outer View within the IOS TouchableOpacity, I needed to be able to set styles directly on the outer container of TouchableOpacity, to be able to get the flex needed

We could adjust this to be a generic touchableOpacityStyles prop?

[dantman]

Better innerStyle/outerSyle handling that works the same with and without the polyfill would be better.

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