[TIMOB-16970] Added splash screen to BB projects

Jira tckets related:
[TIMOB-16970](https://jira.appcelerator.org/browse/TIMOB-16970)
[TIMOB-16784](https://jira.appcelerator.org/browse/TIMOB-16784)
[TIMOB-13619](https://jira.appcelerator.org/browse/TIMOB-13619)