Revert "Make compose landscape(phone) go fullscreen"

This reverts commit 0108aeb5b13fa8a289c42bc70fac1bebac0e9746.

There are too many issues that crop up in this mode.

Bug: 5121640
Change-Id: I6264a63cada973a7ee327ff4c7e7af5df5a6fdb3
4 files changed