Don't filter demoted conversation from app subtext

If the notification channel is a demoted converation, we still want to
include it as a notification channel that can bypass DND under the
"apps" preference for DND.

Test: manual, make RunSettingsRoboTests7
Fixes: 152765113
Change-Id: Ief072b19280b0dc6e6c37d2d46d51f045d42bb4e

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

@@ -109,7 +109,7 @@ public class ZenModeBypassingAppsPreferenceController extends AbstractZenModePre
             String pkg = entry.info.packageName;
             for (NotificationChannel channel : mNotificationBackend
                     .getNotificationChannelsBypassingDnd(pkg, entry.info.uid).getList()) {
-                if (!TextUtils.isEmpty(channel.getConversationId())) {
+                if (!TextUtils.isEmpty(channel.getConversationId()) && !channel.isDemoted()) {
                     // conversation channels that bypass dnd will be shown on the People page
                     continue;
                 }