Update HDCP for external displays

So the secure flag of Display object in Display Manager (DM) can
be set correctly. HWC calls the onSync method as a workaround,
to notify SurfaceFlinger (SF) about hdcp changes, SF in turn sends
an event to DM, DM will then fetch and update display info.

Bug: 280818362
Test: manual
Change-Id: I29ce0337865b51c0fc7bf7c2d7fdd4cd6d66ef46
diff --git a/services/surfaceflinger/DisplayDevice.cpp b/services/surfaceflinger/DisplayDevice.cpp
index 950b05e..799d62c 100644
--- a/services/surfaceflinger/DisplayDevice.cpp
+++ b/services/surfaceflinger/DisplayDevice.cpp
@@ -353,6 +353,10 @@
     return mCompositionDisplay->isSecure();
 }
 
+void DisplayDevice::setSecure(bool secure) {
+    mCompositionDisplay->setSecure(secure);
+}
+
 const Rect DisplayDevice::getBounds() const {
     return mCompositionDisplay->getState().displaySpace.getBoundsAsRect();
 }