Upgrade leak_tracker to 7.0.6. (#130346)

Author: polina-c

packages/flutter/pubspec.yaml

@@ -22,7 +22,7 @@ dev_dependencies:
   flutter_goldens:
     sdk: flutter
   fake_async: 1.3.1
-  leak_tracker: 7.0.4
+  leak_tracker: 7.0.6
   leak_tracker_testing: 1.0.0
 
   _fe_analyzer_shared: 62.0.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
@@ -74,4 +74,4 @@ dev_dependencies:
   webkit_inspection_protocol: 1.2.0 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
   yaml: 3.1.2 # THIS LINE IS AUTOGENERATED - TO UPDATE USE "flutter update-packages --force-upgrade"
 
-# PUBSPEC CHECKSUM: 32f0
+# PUBSPEC CHECKSUM: 46f2