The earlier reduction was not sufficient for all cases.
If the min width is totally removed, it makes the buttons too
small in portrait, causing wrapping. Forcing to 0.5 weight will
make it too wide in landscape.
Change-Id: I02a71a065f14d5f75bea68aab25c8b16941589e9
Also reduce the min width of the buttons because the horizontal space
available has reduced.
Bug: 5156394
Change-Id: Ib7adfa208565503bbf537cb469e7d8feded2c5b8