[TIMOB-13967] BlackBerry : Layout crashes if we touch the views before it finishes laying out the whole layout

Fixes an issue in scroll view which would prevent the content view
from being properly sized. This was caused by an un-initialized internal flag
which would be randomly set.

See JIRA ticket for a test case. Launch the app over and over to verify
the bad behavior no longer occurs. A few dozen launches should give you a good
indication it no longer occurs.