Initialize Global Actions Panel when one is available

This bug was accidentally introduced when the dialog initialization
logic was modified in ag/6925312.

Test: manual
Bug: 129964234
Change-Id: I7a1a01c22e556b362bbb850be94464530e5a3a96

packages/SystemUI/src/com/android/systemui/globalactions/GlobalActionsDialog.java

@@ -1588,6 +1588,7 @@ public class GlobalActionsDialog implements DialogInterface.OnDismissListener,
                 mBackgroundDrawable = mContext.getDrawable(
                         com.android.systemui.R.drawable.global_action_panel_scrim);
                 mScrimAlpha = 1f;
+                initializePanel();
             }
             mGlobalActionsLayout.setSnapToEdge(true);
             getWindow().setBackgroundDrawable(mBackgroundDrawable);