feat: Support '-5' density for text fields

PiperOrigin-RevId: 465105809

Author: material-web-copybara

packages/mdc-textfield/_variables.scss

@@ -96,7 +96,7 @@ $textarea-disabled-background: rgba(249, 249, 249, 1) !default;
 $ripple-target: '.mdc-text-field__ripple';
 $outlined-stroke-width: 2px !default;
 $height: 56px !default;
-$minimum-height: 40px !default;
+$minimum-height: 36px !default;
 $minimum-height-for-filled-label: 52px !default;
 $maximum-height: $height !default;
 $padding-horizontal: 16px !default;