Prevent overlap of color views in landscape

Removes overlap from the color views which resulted in subotimal looks
when both color views were translucent and the nav bar was on the right
edge.

Also fixes a bug introduced in I2df7092a91eceeb815367ef917dd7289f4f2b27e
where the navigation-bar-on-right-side case got forgotten and caused
flickering in landscape when IMMERSIVE_STICKY was set but the navigation bar
was visible.

Bug: 22876533
Change-Id: I449a82eb3dc3f7b5051f26b37b362a196b4ff63a