fix(material/button): fix color tokens of raised buttons

* fix bug where the raised button is accidentally using
  the flat button color tokens

Author: wagnermaciel

src/material/button/_button-theme.scss

@@ -155,9 +155,9 @@
       $surface,
       $on-surface
     );
-    $primary-color-tokens: tokens-mdc-button-filled.get-color-tokens($theme, $primary, $on-primary);
-    $accent-color-tokens: tokens-mdc-button-filled.get-color-tokens($theme, $accent, $on-accent);
-    $warn-color-tokens: tokens-mdc-button-filled.get-color-tokens($theme, $error, $on-error);
+    $primary-color-tokens: tokens-mdc-button-protected.get-color-tokens($theme, $primary, $on-primary);
+    $accent-color-tokens: tokens-mdc-button-protected.get-color-tokens($theme, $accent, $on-accent);
+    $warn-color-tokens: tokens-mdc-button-protected.get-color-tokens($theme, $error, $on-error);
 
     &.mat-unthemed {
       @include mdc-button-protected-theme.theme($default-color-tokens);

src/material/core/tokens/m2/mdc/_button-protected.scss

@@ -69,7 +69,7 @@ $prefix: (mdc, button-protected);
     pressed-state-layer-color: $on-primary,
     label-text-color: if($on-color, $on-color, inherit),
     disabled-container-color: rgba($on-surface, 0.12),
-    disabled-label-text-color: rgba($on-surface, 0.38)
+    disabled-label-text-color: rgba($on-surface, if($is-dark, 0.5, 0.38))
   );
 }