mm-camera-intf: Lower the log level or unnecessary error message

Some of the error logs are warning/info level.

BUG=31157669

Change-Id: I89cb4015360245dc30de42541214dbd13ccc3375
diff --git a/QCamera2/stack/mm-camera-interface/src/mm_camera_channel.c b/QCamera2/stack/mm-camera-interface/src/mm_camera_channel.c
index 881c5b0..3124484 100644
--- a/QCamera2/stack/mm-camera-interface/src/mm_camera_channel.c
+++ b/QCamera2/stack/mm-camera-interface/src/mm_camera_channel.c
@@ -889,7 +889,7 @@
         }
         break;
     default:
-        LOGE("invalid state (%d) for evt (%d)",
+        LOGW("invalid state (%d) for evt (%d)",
                     my_obj->state, evt);
         break;
     }