Fix an issue that a free memory is accessed

In error state, request thread join is not executed. And,
Camera3Device's mId can be accessed from String& after being freed with
CLOGE().

This fix will address by changing reference type to normal variable.

Bug: 268437033
Change-Id: Iad3fcd0fbbaf1e18a2b95093aba08015a933374c

services/camera/libcameraservice/device3/Camera3Device.h

@@ -1010,7 +1010,7 @@ class Camera3Device :
 
         wp<NotificationListener> mListener;
 
-        const String8&     mId;       // The camera ID
+        const String8      mId;       // The camera ID
         int                mStatusId; // The RequestThread's component ID for
                                       // status tracking