[Navigation bar] Allow "right to left" gesture to launch search panel

Symptom: "Bottom to up" gesture can launch search panel in portrait, but "right to left" gesture CANNOT in landscape.
Root Cause: Not handled.
Solution: Set swapXY to handle this in landscape case.

Change-Id: I1793280b3656af6912e6b4583b08e80a0a38e44a