fix(mdSelect): Fix theme change dynamically (#10152)

When the theme is changed dynamically, the Option Element would have the previous theme.

* Add $mdTheming on OptionDirective

Fixes #9894

Author: rafaelnery

src/components/select/select.js

@@ -921,7 +921,7 @@ function SelectMenuDirective($parse, $mdUtil, $mdConstant, $mdTheming) {
 
 }
 
-function OptionDirective($mdButtonInkRipple, $mdUtil) {
+function OptionDirective($mdButtonInkRipple, $mdUtil, $mdTheming) {
 
   return {
     restrict: 'E',
@@ -954,6 +954,8 @@ function OptionDirective($mdButtonInkRipple, $mdUtil) {
     var optionCtrl = ctrls[0];
     var selectCtrl = ctrls[1];
 
+    $mdTheming(element);
+
     if (selectCtrl.isMultiple) {
       element.addClass('md-checkbox-enabled');
       element.prepend(CHECKBOX_SELECTION_INDICATOR.clone());