issue #2517: add the LocalVarToAuto.py script
closed #2517: Use LocalVarToAuto.py to change Samples src file
issue #2517: Restore TestCpp proj.android that edited by mistake.
Merge pull request #3430 from boyu0/iss2517_update_local_var_to_auto

closed #2517: Update all test cases use auto for local variables