Load zen mode type icon options from the proper resources

* Move default mode icons from Settings res to core res.
* Add array resources for the icon options and their descriptions.
* As the initial version of the list, use the default mode icons.

Bug: 333901673
Test: atest IconOptionsProviderImplTest
Flag: android.app.modes_ui
Change-Id: I66669e67a9d607268c05d5ed3df6c9555e57864c