Add wallpapaer edit button to BottomActionBar

Also remove the Cancel buttom from Enum, the cancel button should be always visible and can't be disabled, since it's binding with BACK key. It does not make sense to disable the cancel button but back key still be cilckable.

Test: Manually
Bug: 155043943
Change-Id: Iaa66c24040d4fa379ca559378ca143810e473740