Directly go to Glanceable Hub edit mode on long press.

This changelist removes the FAB interaction from the edit mode entry
flow.

Test: atest CommunalViewModelTest#longClickDirectlyStartsEditMode
Flag: com.android.systemui.glanceable_hub_direct_edit_mode
Bug: 382531177
Change-Id: I90db522988947b860cfd9a32ea73d7ec01ee6551