No space between Cancel / copy /move actions buttons

Update Material design button style by spec
https://material.io/design/components/buttons.html#hierarchy-placement

Dependency: ag/4914252
Bug: 113507361
Test: Manual check Copy/Move/Pick/Create action
      atest DocumentsUITest

Change-Id: Icaca76716f762952295d647eda5d654696dfc3d5