Add support for rotating a FAB pre-L

As the shadow is baked into the view pre-L, the shadow
is also rotated when the view is rotated. This CLs
fixes that by offsetting any view property rotation
in both the shadow and border drawables.

BUG: 24464887

Change-Id: I8c39fbe90a2251a5a79b3f31328d47e55f74f931
7 files changed