SurfaceFlinger: rename FrameTimeline's setActualEndTime

Rename setActualEndTime to setAcquireFenceTime to better reflect what
the method keeps track of.

Change-Id: I1865a48d0cc4fbb55c4ec0fe2ff172fd31735ccb
Test: SF unit tests
diff --git a/services/surfaceflinger/FrameTimeline/FrameTimeline.h b/services/surfaceflinger/FrameTimeline/FrameTimeline.h
index 2ca1e23..cfe8170 100644
--- a/services/surfaceflinger/FrameTimeline/FrameTimeline.h
+++ b/services/surfaceflinger/FrameTimeline/FrameTimeline.h
@@ -85,10 +85,10 @@
 
     // Actual timestamps of the app are set individually at different functions.
     // Start time (if the app provides) and Queue time are accessible after queueing the frame,
-    // whereas End time is available only during latch.
+    // whereas Acquire Fence time is available only during latch.
     virtual void setActualStartTime(nsecs_t actualStartTime) = 0;
     virtual void setActualQueueTime(nsecs_t actualQueueTime) = 0;
-    virtual void setActualEndTime(nsecs_t actualEndTime) = 0;
+    virtual void setAcquireFenceTime(nsecs_t acquireFenceTime) = 0;
 };
 
 /*
@@ -163,7 +163,7 @@
 
     void setActualStartTime(nsecs_t actualStartTime) override;
     void setActualQueueTime(nsecs_t actualQueueTime) override;
-    void setActualEndTime(nsecs_t actualEndTime) override;
+    void setAcquireFenceTime(nsecs_t acquireFenceTime) override;
     void setPresentState(PresentState state) override;
     void setActualPresentTime(nsecs_t presentTime);
     void dump(std::string& result);