Outlined Text Field: shape-radius doesn't factor in Leading Icon

[kfranqueiro]

What MDC Web Version are you using?

0.40.x

What browser(s) is this bug affecting?

All

What are the steps to reproduce the bug?

Edit the baseline-leading-icon.html screenshot test page, adding the test-shaped-text-field--outline class to each mdc-text-field--outlined element.

What is the expected behavior?

Floating label should align with the notched outline properly like it does in the shape-radius tests.

What is the actual behavior?

The floating-label style for text field with leading icon is overriding the custom shape radius styles.

Any other information you believe would be useful?

We may be able to factor this into the shape-radius mixin.

The same problem exists in the MDC Select package on the feat/select-new branch (which will be merged for 0.41.0).

[KNawm]

Also in the demo of Textfields not one of the three shaped outlined text fields displays the label correctly

[kfranqueiro]

That has already been fixed in #3929 on master, for #3158. This is somewhat of a follow-up though.