Android: Window leak in Ti.UI.currentWindow

Steps to reproduce:
1. Create application, put attached files in Resources
2. Run ti build with --debug-host localhost:8990
3. Open chrome-devtools:// link in Chrome
4. Resume script execution, wait for app load
5. In memory tab, press "Take snapshot"
6. In app press "OPEN 2ND WINDOW"
7. In memory tab, press "Take snapshot"
8. In app press "OPEN 3RD WINDOW"
9. In memory tab, press "Take snapshot"
10. In app press back button
11. In memory tab, press "Take snapshot"
12. In app press back button
13. In memory tab, press "Take snapshot"

Now you got five snapshots.
1. Select "Snapshot 2"
2. Change "Summary" to "Comparison", put "Window" in "Class filter"
3. Expand "Window", observe one new "Window" instance, remember @id
4. Select "Snapshot 5", put "Window" in "Class filter"
5. Expand "Window", observe three instance of "Window"
6. Select "Window" instance with @id from (3)
7. Observe "Retainers" below