Steps to reproduce:
1. In a project's TiApp editor, choose 1.8+ SDK and V8 runtime.
2. Verify Android debugger works
3. Switch to 1.7.x in TiApp editor (V8 runtime option is grayed, but still as a property in tiapp.xml)
4. Launch the debugger again
the debugger should work as normal
the debugger with fail with debugger cannot connect (after ~5min timeout)
either edit tiapp.xml sources to remove V8 runtime property or switch to Rhino runtime prior to switching from 1.8+ to 1.7 SDK