Make a public activity for zen access details.

Bug: 128547723
Test: manual
Change-Id: I0546cbb37c2be50bff44396fa2874d9eb294813c
diff --git a/src/com/android/settings/Settings.java b/src/com/android/settings/Settings.java
index 97ff613..ead0d6a 100644
--- a/src/com/android/settings/Settings.java
+++ b/src/com/android/settings/Settings.java
@@ -96,6 +96,7 @@
     public static class PictureInPictureSettingsActivity extends SettingsActivity { /* empty */ }
     public static class AppPictureInPictureSettingsActivity extends SettingsActivity { /* empty */ }
     public static class ZenAccessSettingsActivity extends SettingsActivity { /* empty */ }
+    public static class ZenAccessDetailSettingsActivity extends SettingsActivity {}
     public static class ConditionProviderSettingsActivity extends SettingsActivity { /* empty */ }
     public static class UsbSettingsActivity extends SettingsActivity { /* empty */ }
     public static class UsbDetailsActivity extends SettingsActivity { /* empty */ }