[SF] Change VSyncDispatchTimerQueue::Schedule to return ScheduleResult

Removes the optional return as Schedule always returns value.

BUG: 284845445
Test: atest VSyncDispatchTimerQueueTest
Change-Id: I5b0dd11144ff5df227a9fa23a3a3ded3b50f3ea2
diff --git a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
index 2a3e5b6..84ccf8e 100644
--- a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
+++ b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.cpp
@@ -85,8 +85,8 @@
     return {mArmedInfo->mActualVsyncTime};
 }
 
-std::optional<ScheduleResult> VSyncDispatchTimerQueueEntry::schedule(
-        VSyncDispatch::ScheduleTiming timing, VSyncTracker& tracker, nsecs_t now) {
+ScheduleResult VSyncDispatchTimerQueueEntry::schedule(VSyncDispatch::ScheduleTiming timing,
+                                                      VSyncTracker& tracker, nsecs_t now) {
     auto nextVsyncTime =
             tracker.nextAnticipatedVSyncTimeFrom(std::max(timing.lastVsync,
                                                           now + timing.workDuration +
@@ -407,16 +407,13 @@
         return callback->addPendingWorkloadUpdate(*mTracker, now, scheduleTiming);
     }
 
-    const auto resultOpt = callback->schedule(scheduleTiming, *mTracker, now);
+    const auto result = callback->schedule(scheduleTiming, *mTracker, now);
 
-    if (!resultOpt) {
-        return {};
-    }
     if (callback->wakeupTime() < mIntendedWakeupTime - mTimerSlack) {
         rearmTimerSkippingUpdateFor(now, it);
     }
 
-    return resultOpt;
+    return result;
 }
 
 std::optional<ScheduleResult> VSyncDispatchTimerQueue::update(CallbackToken token,
diff --git a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.h b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.h
index afb67ae..252c09c 100644
--- a/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.h
+++ b/services/surfaceflinger/Scheduler/VSyncDispatchTimerQueue.h
@@ -48,8 +48,7 @@
     std::optional<nsecs_t> lastExecutedVsyncTarget() const;
 
     // This moves the state from disarmed->armed and will calculate the wakeupTime.
-    std::optional<ScheduleResult> schedule(VSyncDispatch::ScheduleTiming, VSyncTracker&,
-                                           nsecs_t now);
+    ScheduleResult schedule(VSyncDispatch::ScheduleTiming, VSyncTracker&, nsecs_t now);
     // This will update armed entries with the latest vsync information. Entry remains armed.
     void update(VSyncTracker&, nsecs_t now);