Fix do not disturb bypass user restriction

Do not disturb search result can still switch on/off when users are
restricted by DISALLOW_ADJUST_VOLUME. The DND search result is presented
by slice and there was no user restriction check when creating DND
slice, which caused DND search result can access. To prevent DND from
being access if user restriction is enabled, adding user restriction
check during creating the DND slice.

Bug: 242846154
Test: robotest pass and manual test
Change-Id: I897a99e9dda2f9f84365d96841a4c4f4cf975331