Charger: support secondary connector

set first connector as default

Test: charging animation can show in correct display
Bug: 191831427
Signed-off-by: Jack Wu <wjack@google.com>
Change-Id: Ia79981569e799f01db0036f0ecbdaca36a539ac6
diff --git a/healthd/healthd_draw.h b/healthd/healthd_draw.h
index 0b48ce8..0d7ac7a 100644
--- a/healthd/healthd_draw.h
+++ b/healthd/healthd_draw.h
@@ -31,8 +31,9 @@
   // Redraws screen.
   void redraw_screen(const animation* batt_anim, GRSurface* surf_unknown);
 
+  // According to the index of Direct Rendering Manager,
   // Blanks screen if true, unblanks if false.
-  virtual void blank_screen(bool blank);
+  virtual void blank_screen(bool blank, int drm);
 
   static std::unique_ptr<HealthdDraw> Create(animation *anim);