SF: Simplify Scheduler's hardware VSYNC delegate

As a step toward hiding implementation details of how Scheduler handles
changes in a display's power mode (e.g. toggling of hardware/synthetic
VSYNC), move and rename SurfaceFlinger::setVsyncEnabled to Scheduler::
onHardwareVsyncRequest. This hides setPendingHardwareVsyncState.

(getPendingHardwareVsyncState will be moved to Scheduler later.)

Store the per-display hal::PowerMode in Scheduler. On power mode change
in SurfaceFlinger::setPowerModeInternal, update the Scheduler for every
display, not just the active display.

Inject the delegate into VsyncSchedule's constructor, instead of passing
the (partly unrelated) ISchedulerCallback to several member functions.

Bug: 271431077
Bug: 241286146
Bug: 255635821
Bug: 241285191
Test: FoldableTest
Change-Id: I157b0895a77f055763f86dd21602d0dac13622da
diff --git a/services/surfaceflinger/tests/unittests/TestableScheduler.h b/services/surfaceflinger/tests/unittests/TestableScheduler.h
index 5d2dfe4..aac11c0 100644
--- a/services/surfaceflinger/tests/unittests/TestableScheduler.h
+++ b/services/surfaceflinger/tests/unittests/TestableScheduler.h
@@ -27,6 +27,7 @@
 #include "Scheduler/Scheduler.h"
 #include "Scheduler/VSyncTracker.h"
 #include "Scheduler/VsyncController.h"
+#include "Scheduler/VsyncSchedule.h"
 #include "mock/MockVSyncDispatch.h"
 #include "mock/MockVSyncTracker.h"
 #include "mock/MockVsyncController.h"
@@ -80,9 +81,13 @@
                                                    new VsyncSchedule(displayId, std::move(tracker),
                                                                      std::make_shared<
                                                                              mock::VSyncDispatch>(),
-                                                                     std::move(controller))));
+                                                                     std::move(controller),
+                                                                     mockRequestHardwareVsync
+                                                                             .AsStdFunction())));
     }
 
+    testing::MockFunction<void(PhysicalDisplayId, bool)> mockRequestHardwareVsync;
+
     void unregisterDisplay(PhysicalDisplayId displayId) {
         ftl::FakeGuard guard(kMainThreadContext);
         Scheduler::unregisterDisplay(displayId);
@@ -163,6 +168,8 @@
                                           : VsyncSchedule::HwVsyncState::Disabled;
     }
 
+    using Scheduler::onHardwareVsyncRequest;
+
 private:
     // ICompositor overrides:
     void configure() override {}