SystemUI: Fix SearchPanelView miscalculation

The SystemUI declares the navbar to be movable to the side in landscape when the short
side's DP calculation equals to less than 600. This means that the nav bar will be at the
bottom/the screen is considered "large" if it's greater OR EQUAL to 600, not just greater.

Fixes OMNI-1129 and OMNI-1130.

Change-Id: I90322e40ebf0c4bb94146e28eb2d9b8f8a4444f8
Fix translucent navigation bar layout on tablets in landscape.

The status bar blocker view was visible and stretched over the whole
navigation bar, even though it's not even needed on tablets, as the
status bar never extends into the navigation bar there. Fix that by
hiding the blocker view, but keep it in the layout in oder to not
clutter the code with null checks.

Also cleanup unneeded method override.

Change-Id: I50d58e6e3496516b37f8c36b497cf8c9f569325c
Merge pull request #2 from PAC-man/pac-4.4

Second pull for new dev build