Fix work tab accessbility issues.

The issue is that the accessibility scanner says tap target is 46dp rather than 48dp because of the 1dp padding that is added
to the viewgroup. Rather, we should delegate that 1dp to the insets of the drawable instead.

bug: 379222957
Test manually, photos:
beforeAccessibilityscanner: https://drive.google.com/file/d/1-XssMfXstpKQk5Ve7l5UCPFORtCkYluH/view?usp=sharing
before:https://drive.google.com/file/d/1rip4gIKpoOw-cCNroEjrpcJ9TMSthHhB/view?usp=sharing
after: https://drive.google.com/file/d/1dOh4yxEAPBG_pGn92yUGizTCLTTW1w2K/view?usp=sharing
Flag: NONE bug fix changing dp

Change-Id: I5ac69e5d92bbbbc3617e30801316eb04d65ace7a