Fix a minor bug in transitions to left-edge-up landscape.

Fix MAX_TRANSITION_TILT to remove the entry for upside-down
orientation, which should've been removed when that orientation itself
was removed.  This was causing the phone to require further vertical
tilt for transitions to left-edge-up landscape, as compared to
right-edge-up landscape or portait mode.

Bug: 2639310
Change-Id: I8fe2e2baecd6a9c2cecae95d316b0d4e2f8ee251