Revert "navbar: remove stock 3-button layout float on phones to properly size custom keys"

This changes the shape of the stock 3 button layout for no good reason.

Plus, Dan said to. trololol.

This reverts commit 5e38e0482617f07acc8c82285d2b9e2aea7fb1e2.

Change-Id: I5c92e8a55a0d48bd193ad186f3cf3ec9c996acc1
Merge "Revert "navbar: remove stock 3-button layout float on phones to properly size custom keys"" into kk44
Revert "Revert "navbar: remove stock 3-button layout float on phones to properly size custom keys""

Dan, put the pipe down.

P.s.: 3 button layouts are SO 2012.

This reverts commit 4403d0c115d89ba98b670b7943391409ba103f56.

Change-Id: I73c4dc5dea1c68033d3d48779f8b4df947f6386a
Merge "Revert "Revert "navbar: remove stock 3-button layout float on phones to properly size custom keys""" into kk44