Revert "Revert "NavbarHeight: remove unnecessary conditional.""

My device has hardware keys, isn't old and small, and conditionals like this are stupid. This is what the FUCKING OVERLAY IS FOR.

This reverts commit d74b54d5bf16915262f6213e5dd30defe1bd1a74.

Change-Id: I8f55e996502c64198591576eb5eca3252765b427