[TIMOB-25041] Add support for V8 custom startup snapshot

Since Android runs on v8 engine since v6.0.0 of the SDK, a Titanium app can now take advantage of the v8 "Custom startup snapshots" feature, which allows adding pre-"compiled" binary representation of the scripts heap, those making app boot time faster. More on "Custom startup snapshots": https://v8project.blogspot.co.il/2015/09/custom-startup-snapshots.html This technique is already implemented by other multi-platform frameworks as can be seen here https://www.nativescript.org/blog/improving-app-startup-time-on-android-with-webpack-v8-heap-snapshot