feat(textfield): Add field-sizing token

PiperOrigin-RevId: 896050822

Author: material-web-copybara

textfield/internal/_input.scss

@@ -18,6 +18,7 @@
 
   .input {
     caret-color: var(--_caret-color);
+    field-sizing: var(--_field-sizing);
     // remove extra height added by horizontal scrollbars
     overflow-x: hidden;
     text-align: inherit;

tokens/_md-comp-filled-text-field.scss

@@ -65,6 +65,7 @@ $supported-tokens: (
   'error-leading-icon-color',
   'error-supporting-text-color',
   'error-trailing-icon-color',
+  'field-sizing',
   'focus-active-indicator-color',
   'focus-active-indicator-height',
   'focus-caret-color',
@@ -157,6 +158,7 @@ $_default: (
         if($exclude-hardcoded-values, null, 2px),
       'with-label-top-space': if($exclude-hardcoded-values, null, 8px),
       'with-label-bottom-space': if($exclude-hardcoded-values, null, 8px),
+      'field-sizing': if($exclude-hardcoded-values, null, fixed),
       // TODO(b/270705687): remove when focus-caret-color token added
       'focus-caret-color': map.get($deps, 'md-sys-color', 'primary'),
       'with-leading-icon-leading-space':

tokens/_md-comp-outlined-text-field.scss

@@ -57,6 +57,7 @@ $supported-tokens: (
   'error-outline-color',
   'error-supporting-text-color',
   'error-trailing-icon-color',
+  'field-sizing',
   'focus-caret-color',
   'focus-input-text-color',
   'focus-label-text-color',
@@ -144,6 +145,7 @@ $_default: (
         if($exclude-hardcoded-values, null, 2px),
       'input-text-suffix-leading-space':
         if($exclude-hardcoded-values, null, 2px),
+      'field-sizing': if($exclude-hardcoded-values, null, fixed),
       // TODO(b/270705687): remove when focus-caret-color token added
       'focus-caret-color': map.get($deps, 'md-sys-color', 'primary'),
       'with-leading-icon-leading-space':