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/ZenModeDisplayFragment.java

@@ -54,7 +54,6 @@ public class ZenModeDisplayFragment extends ZenModeFragmentBase {
 
     @Override
     public int getMetricsCategory() {
-        // TODO: b/332937635 - make this the correct metrics category
-        return SettingsEnums.DND_PEOPLE;
+        return SettingsEnums.ZEN_MODE_DISPLAY_SETTINGS;
     }
 }