[HSUM] For glanceable hub, use SmartspaceManager in the current foreground user context.

Also applied ktfmt fixes.

Flag: EXEMPT bugfix
Bug: 376543613
Test: check glanceable hub timers on a device with HSUM.
Test: CommunalSmartspaceControllerTest
Change-Id: I1abfd81e06d2d93d3ba8fafe801ba3e8e5c5adf9