[sb] set ongoing call chip to GONE

CBSF used GONE here, and so the view binder should as well. This fixes
the issue where when the chip is not showing there is just padding
between the clock and the notif icons

Test: manual
Flag: com.android.systemui.status_bar_simple_fragment
Bug: 364360986
Change-Id: I3730f71ce317390fab64620f07ac51773a22d65f