ability to turn off FontScaling when using inline display

[chrisdrackett]

Feature request

While I agree every app should have font scaling ideally sometimes you have a section of your app where the text does not scale. Currently as far as I can tell there isn't any way like with the Text components allowFontScaling prop to turn this off for the date time picker.

Why it is needed

Gives the picker more flexibility.

Possible implementation

I'm not up to date on the native code for date pickers myself (yet)

[rsml]

allowFontScaling is definitely needed. Support for maxFontSizeMultiplier would also be appreciated.