[SB] Click on status bar system icons should open QS

Differentiates between clicks on system icons vs notification area
in the status bar.

Test: PhoneStatusBarViewControllerTest
Test: Click on system icons should open QS panel when dual shade is
enabled.
Flag: com.android.systemui.scene_container
Bug: 408483470

Change-Id: I75bcb0156f01e6164aa8b9aa6caae8b91549d3ad