Revert "Expose role API for Settings on RoleManager."

Revert "Expose role API for Settings on RoleManager."

Revert "Expose role API for Settings on RoleManager."

Revert submission 13261069-role-settings-api

Reason for revert: Might be breaking RcsProvisioningMonitorTest
Bug: 177227549
Test: RcsProvisioningMonitor
Reverted Changes:
Idbd0db119:Expose role API for Settings on RoleManager.
Iafe1d2460:Expose role API for Settings on RoleManager.
I6a3e5a26c:Expose role API for Settings on RoleManager.

Change-Id: Ifa79bcf603c6553579c0d9dbcab4df60f9d5369c