Fix for onboarding globe flicker.

Also fix for restricting onboarding screen to portrait for phones.

Change-Id: I6cafaddd5f83130269393b3ac1050f122acc3b9f
Fine tuned velocity at which scroll hides menu chrome.

Change-Id: Iee34eb610b799282f0405def3a880be30a63a60c
Only run build script for retrieving css update on install.

Change-Id: Ib4fe258c6c96fc81537932a3cd5c740b4f7e94ef
Merge "Fine tuned velocity at which scroll hides menu chrome."
Merge "Only run build script for retrieving css update on install."