Honor min and max snackbar widths in 2 pane layouts

b/16395550

When the fab was changed to sit in the TL in 2 pane layout
the min and max widths were never updated to match.

Note: we chose different max widths of the snack bar for
7" and 10" displays.

Change-Id: I8b3e31b4db2c1c721bb32b68b422cb5e36e7bd4e
4 files changed