Outlined Text Field Helper Text should be indented

[bwobrien]

Like the Box Text Field, Outlined Text Field's helper text should left-align with the Text Field's label and input text.

What MDC Web Version are you using?

0.29.0

What browser(s) is this bug affecting?

All

What OS are you using?

All

What are the steps to reproduce the bug?

1. Run the demo server, or try it on the live demo: https://material-components-web.appspot.com/text-field.html
2. Type fewer than 8 characters in the Outlined Text Field and blur to trigger the invalid state and validation message.

What is the expected behavior?

Validation (helper) text should be indented to vertically align with Label and Input text.

What is the actual behavior?

Validation (helper) text is aligned with the leading edge of the container.

Any other information you believe would be useful?

Screenshot showing the difference between Outlined and Box: