Workaround FAB background not being drawn on API 19

KitKat seems to have an issue where it does not drawn
the top-left section of the FAB background when the
view is rotated with a non-divisble by 90 angle.

Worked around by moving to software rendering in those
cases.

BUG: 28691586
Change-Id: I551ecf4d4ead5e99093b624fdcbf1e70f75acfed
1 file changed