base

When display is frozen prefer preserving orientation.

While the display is frozen, we just want to preserve the orientation
from changing. Otherwise we will have strange loops as
SHOW_WHEN_LOCKED windows appear/dissapear over relaunch.

Bug: 29994732
Bug: 29542506
Bug: 29942346
Change-Id: Iec5f79db0cf5001c3c8e5d6a7a0136b758e0a934