Add a h/w composer API to allow the HAL to trigger a redraw

This is useful in various situations, for instance if the HAL
wants to change its compositing strategy.

Bug: 4488017
Change-Id: I5afc14e5917c6db7926d7417d48677d5aba50caa
diff --git a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
index 30eb258..3ebc7b6 100644
--- a/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
+++ b/services/surfaceflinger/DisplayHardware/DisplayHardwareBase.h
@@ -37,7 +37,7 @@
 
                 ~DisplayHardwareBase();
 
-    // console managment
+    // console management
     void releaseScreen() const;
     void acquireScreen() const;
     bool isScreenAcquired() const;