Fix setting reset with mult-user

There is a system API to reset settings to the default value, the
API is user sensitive. But the user id is not used in the setting
provider, it only reset setting for the system user. Uses the
owning user ID instead to fix.

Bug: 383309016
Bug: 383211851
FLAG: EXEMPT TEST
Test: 1. create a new user
      2. atest SettingsProviderTest
Change-Id: I69a437620132c6ebcd6f38f0965af08ca0a2073c