Visual updates for DND screens

(part 1), emphasizing People

Test: atest, manual
Bug: 137397357
Change-Id: I5672462feb480ea2fced70470ed7c2c8116fadfd

src/com/android/settings/notification/zen/AbstractZenCustomRulePreferenceController.java

@@ -19,6 +19,7 @@ package com.android.settings.notification.zen;
 import android.app.AutomaticZenRule;
 import android.content.Context;
 import android.os.Bundle;
+import android.util.Slog;
 
 import androidx.preference.Preference;