[MOB-1124] Don't log an error when notification channel name is not set

Author: vbabenkoru

iterableapi/src/main/java/com/iterable/iterableapi/IterableNotificationHelper.java

@@ -270,8 +270,8 @@ private String getChannelName(Context context) {
                     channelName = info.metaData.getString(IterableConstants.NOTIFICATION_CHANNEL_NAME);
 
                     // Try to read from a string resource
-                    if (channelName == null) {
-                        int stringId = info.metaData.getInt(IterableConstants.NOTIFICATION_CHANNEL_NAME);
+                    int stringId = info.metaData.getInt(IterableConstants.NOTIFICATION_CHANNEL_NAME);
+                    if (channelName == null && stringId != 0) {
                         channelName = context.getString(stringId);
                     }
                     IterableLogger.d(IterableNotificationBuilder.TAG, "channel name: " + channelName);