* 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
* Propose icons from com.android.internal.R instead of android.R (as a proof of concept) since this is what we'll be doing with the final icons.
* Provide the icon options as a parameter to the controller (can also be used for testing).
* Fix some Lint warnings.
Test: atest ZenModeIconPickerListPreferenceControllerTest
Bug: 333901673
Flag: android.app.modes_ui
Change-Id: I023eed0fd5719c5c4540f8d145335f60d088e7fb