use MaterialCommunityIcons instead of MaterialIcons

Describe the feature

Use MaterialCommunityIcons instead of MaterialIcons by default in all the components that take the icon prop.

Motivation

I found out MaterialIcons lacks a lot of icons like logout of thumb-up-outline. But MaterialCommunityIcons looks like MaterialIcons and also have lots of other useful icons. Is there a reason you chose MaterialIcons? at least we can let the devs to select their preferences.

[connercms]

you can render any icon you want from react-native-vector-icons by passing it as a prop

example

<IconButton 
icon={({ size, color}) => (
    <MaterialCommunityIcons 
    name={'logout'} 
    size={size} 
    color={color}/>
)} 
onPress={this.onPress}
/>

[satya164]

We’ll switch to MaterialCommunityIcons in 3.0.