[ExposedDropdownMenu] Fixed missing icon activated color.

PiperOrigin-RevId: 466742317
(cherry picked from commit 9147704)

Author: leticiarossi

lib/java/com/google/android/material/textfield/res/color/m3_textfield_indicator_text_color.xml

@@ -15,6 +15,7 @@
      limitations under the License.
 -->
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
+  <item android:color="?attr/colorPrimary" android:state_activated="true"/>
   <item android:alpha="0.38" android:color="?attr/colorOnSurface" android:state_enabled="false"/>
   <item android:color="?attr/colorOnSurfaceVariant"/>
 </selector>