Style priority modes items in aggregator

* Different color if active.
* Trigger description / "ON" / "Paused" / "Tap to set up" depending on enabled and active status (strings may be revised later).

This CL also adds a helper class to create ZenModes, reducing boilerplate in unit tests.

Bug: 346575288
Test: atest com.android.settings.notification.modes
Flag: android.app.modes_ui
Change-Id: Ia0e16b8be5284d13bed4366cbee0f92748bf2f85

src/com/android/settings/notification/modes/ZenModeIconPickerIconPreferenceController.java

@@ -55,7 +55,7 @@ class ZenModeIconPickerIconPreferenceController extends AbstractZenModePreferenc
 
         FutureUtil.whenDone(
                 zenMode.getIcon(mContext, ZenIconLoader.getInstance()),
-                icon -> mHeaderController.setIcon(IconUtil.applyTint(mContext, icon))
+                icon -> mHeaderController.setIcon(IconUtil.applyNormalTint(mContext, icon))
                         .done(/* rebindActions= */ false),
                 mContext.getMainExecutor());
     }