Notification importance/selected sound conflict fixes.

- When you've selected "Silent" as your sound, update notification
importance messaging to match.
- When you explicitly move from a silent type of notifications to a
loud type, but have "Silent" selected as the sound, change the
sound to the default notification sound also.

Change-Id: I462785d593e1d6c7d1e87388aeee1bdcbcf6aa3d
Fixes: 63109928
Test: RunSettingsRoboTests, manual

src/com/android/settings/notification/ChannelNotificationSettings.java

@@ -304,15 +304,19 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
                 break;
             case NotificationManager.IMPORTANCE_DEFAULT:
                 title = getContext().getString(R.string.notification_importance_default_title);
-                if (hasValidSound()) {
+                if (hasValidSound(mChannel)) {
                     summary = getContext().getString(R.string.notification_importance_default);
+                } else {
+                    summary = getContext().getString(R.string.notification_importance_low);
                 }
                 break;
             case NotificationManager.IMPORTANCE_HIGH:
             case NotificationManager.IMPORTANCE_MAX:
                 title = getContext().getString(R.string.notification_importance_high_title);
-                if (hasValidSound()) {
+                if (hasValidSound(mChannel)) {
                     summary = getContext().getString(R.string.notification_importance_high);
+                } else {
+                    summary = getContext().getString(R.string.notification_importance_high_silent);
                 }
                 break;
             default:
@@ -355,10 +359,6 @@ public class ChannelNotificationSettings extends NotificationSettingsBase {
                 Settings.System.NOTIFICATION_LIGHT_PULSE, 0) == 1;
     }
 
-    boolean hasValidSound() {
-        return mChannel.getSound() != null && !Uri.EMPTY.equals(mChannel.getSound());
-    }
-
     void updateDependents(boolean banned) {
         PreferenceGroup parent;
         if (mShowLegacyChannelConfig) {