refactor(button): rename theme mixin to theme-styles to match naming scheme

PiperOrigin-RevId: 482282203

Author: codr

packages/mdc-button/_button-filled-theme.scss

@@ -89,7 +89,7 @@ $light-theme: (
     $theme,
     $prefix: $_custom-property-prefix
   );
-  @include button-shared-theme.theme($theme, $resolver, $query: $query);
+  @include button-shared-theme.theme-styles($theme, $resolver, $query: $query);
 }
 
 @mixin deprecated-theme-styles($query: feature-targeting.all()) {
@@ -111,7 +111,7 @@ $light-theme: (
         label-text-weight: null,
       )
     );
-    @include button-shared-theme.theme(
+    @include button-shared-theme.theme-styles(
       $theme,
       resolvers.$material,
       $query: $query

packages/mdc-button/_button-outlined-theme.scss

@@ -100,7 +100,7 @@ $light-theme: (
 }
 
 @mixin _theme($theme, $resolver, $query) {
-  @include button-shared-theme.theme($theme, $resolver, $query: $query);
+  @include button-shared-theme.theme-styles($theme, $resolver, $query: $query);
   @include outline-color(
     (
       default: map.get($theme, outline-color),

packages/mdc-button/_button-protected-theme.scss

@@ -86,5 +86,5 @@ $light-theme: (
     $theme,
     $prefix: $_custom-property-prefix
   );
-  @include button-shared-theme.theme($theme, $resolver, $query: $query);
+  @include button-shared-theme.theme-styles($theme, $resolver, $query: $query);
 }

packages/mdc-button/_button-shared-theme.scss

@@ -67,7 +67,7 @@ $disabled-container-color: rgba(
   0.12
 ) !default;
 
-@mixin theme($theme, $resolver, $query: feature-targeting.all()) {
+@mixin theme-styles($theme, $resolver, $query: feature-targeting.all()) {
   @include _label-text-typography(
     (
       family: map.get($theme, label-text-font),

packages/mdc-button/_button-text-theme.scss

@@ -90,7 +90,7 @@ $light-theme: (
   $query: feature-targeting.all()
 ) {
   @include theme.validate-theme-styles($light-theme, $theme);
-  @include button-shared-theme.theme($theme, $resolver, $query: $query);
+  @include button-shared-theme.theme-styles($theme, $resolver, $query: $query);
 }
 
 @mixin deprecated-theme-styles($query: feature-targeting.all()) {
@@ -112,7 +112,7 @@ $light-theme: (
   );
 
   .mdc-button {
-    @include button-shared-theme.theme(
+    @include button-shared-theme.theme-styles(
       $theme,
       resolvers.$material,
       $query: $query

packages/mdc-button/_button-theme.scss

@@ -23,6 +23,6 @@
 @forward './button-base' show horizontal-padding;
 @forward './button-outlined-theme' hide theme;
 @forward './button-ripple' show $ripple-target;
-@forward './button-shared-theme' hide theme;
+@forward './button-shared-theme' hide theme-styles;
 
 // TODO(b/175614964): add theme mixin for all variants