Fix shadow clipping in work FAB.

The reason is because the parent container having set clipped children
to true. It is already turned off for the fast letter scroll prototype
so we can probably just set to false all together.

Bug: 383299303
Test: manually-
before: https://drive.google.com/file/d/1GfJtmdX6RPi0QWlpjd1uBNGcDm_ePJko/view?usp=sharing
after: https://drive.google.com/file/d/1Lf6boBSeZ1ZcJ9M24S_JP6jzdUfov8kh/view?usp=sharing
Flag: com.android.launcher3.work_scheduler_in_work_profile
Change-Id: I5060081f51a11dd34fd55afb75a5302759e16670