refactor: change outline textinput label behaviour

[jbinda]

PR makes few things:

1. Refactor outline input label - moves components to separate folder and extract one of the component (LabelBackground)
2. Fix spacing around label in outline input when control has focus or value
3. Adjust label background when backgroundColor is passed in styles to the outline input
4. change input padding from 12 to 14 according to material guidelines inputs

Test plan

BEFORE
Note: more white space on right side of the label and gray background outside the outline border

AFTER
Note: Equal margin of 4px on both sides of the minimized label, correct spacing and border cutoff view sized properly

[callstack-bot]

Hey @jbinda, thank you for your pull request 🤗. The documentation from this branch can be viewed here.