TIMOB-12651 Undo GetStringCritical: V8 string creation may trigger garbage collection, which may trigger Titanium object garbage collection, which may made java calls.
Merge pull request #4070 from BlainHamon/timob-12651_3_1_X

TIMOB-12651 Backport to 3.1.0
Merge remote-tracking branch 'appcelerator/3_1_X' into 3_1_X_lanica