SF: Move hotplug dispatch to Scheduler

Hide the Render/LastComposite details in Scheduler.

Also, dispatch hotplug errors to both EventThreads for consistency.

Bug: 241285191
Bug: 241285945
Test: Hotplug still works.
Change-Id: I425d997274c0272a2bfa352c138750d65d008da5
diff --git a/services/surfaceflinger/Scheduler/Scheduler.cpp b/services/surfaceflinger/Scheduler/Scheduler.cpp
index e6c58a3..3f91682 100644
--- a/services/surfaceflinger/Scheduler/Scheduler.cpp
+++ b/services/surfaceflinger/Scheduler/Scheduler.cpp
@@ -154,9 +154,13 @@
     if (isNew) {
         onHardwareVsyncRequest(displayId, false);
     }
+
+    dispatchHotplug(displayId, Hotplug::Connected);
 }
 
 void Scheduler::unregisterDisplay(PhysicalDisplayId displayId) {
+    dispatchHotplug(displayId, Hotplug::Disconnected);
+
     demotePacesetterDisplay();
 
     std::shared_ptr<VsyncSchedule> pacesetterVsyncSchedule;
@@ -375,15 +379,18 @@
     return connection;
 }
 
-void Scheduler::onHotplugReceived(Cycle cycle, PhysicalDisplayId displayId, bool connected) {
+void Scheduler::dispatchHotplug(PhysicalDisplayId displayId, Hotplug hotplug) {
     if (hasEventThreads()) {
-        eventThreadFor(cycle).onHotplugReceived(displayId, connected);
+        const bool connected = hotplug == Hotplug::Connected;
+        eventThreadFor(Cycle::Render).onHotplugReceived(displayId, connected);
+        eventThreadFor(Cycle::LastComposite).onHotplugReceived(displayId, connected);
     }
 }
 
-void Scheduler::onHotplugConnectionError(Cycle cycle, int32_t errorCode) {
+void Scheduler::dispatchHotplugError(int32_t errorCode) {
     if (hasEventThreads()) {
-        eventThreadFor(cycle).onHotplugConnectionError(errorCode);
+        eventThreadFor(Cycle::Render).onHotplugConnectionError(errorCode);
+        eventThreadFor(Cycle::LastComposite).onHotplugConnectionError(errorCode);
     }
 }