Adds Zen metrics categories

Assigns metrics categories to all modes pages under
ZenModesListFragment. Includes new metrics categories where appropriate.

Bug: 332937635
Test: Build and flash
Flag: android.app.modes_ui
Change-Id: Ic19862ec194b40eae294d3c30240fe3f51304665

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

@@ -62,7 +62,6 @@ public class ZenModeTimePickerFragment extends InstrumentedDialogFragment implem
 
     @Override
     public int getMetricsCategory() {
-        // TODO: b/332937635 - set correct metrics category (or decide to keep this one?)
         return SettingsEnums.DIALOG_ZEN_TIMEPICKER;
     }