Set android Toolbar item color (#233)

Updated toolbar item color to #5D5D5D which matches `NavigationBarTextColor` from App.xaml.

Old color was white text on white background

Co-authored-by: Gerald Versluis <gerald.versluis@microsoft.com>

XamarinCommunityToolkitSample.Android/Resources/values/styles.xml

@@ -21,6 +21,7 @@
     <item name="windowActionModeOverlay">true</item>
 
     <item name="android:datePickerDialogTheme">@style/AppCompatDialogStyle</item>
+    <item name="android:actionMenuTextColor"> #5D5D5D </item>
   </style>
 
   <style name="AppCompatDialogStyle" parent="Theme.AppCompat.Light.Dialog">