SF: Rename postComposition and related for clarity

The "post" in "postComposition" (and related "onPostComposition") can be
read as a preposition or a verb, making the name less easy to understand.

We believe "postComposition" is intended to mean "after composition".
More precisely, it is called after calling `present`, so rename to
"onCompositionPresented". Rename the related "postComposition" on other
classes (Layer, Scheduler) to match.

Splitting out from original motivating discussion in
Ib9d074671e32c95875ef7e0791dd95d6e595e47a.

Bug: 241285491
Bug: 259132483
Test: No new behavior; no new tests

Change-Id: I7f62728ea35aee47ebeac10dc7de82258080690e
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 700baa2..7c3a8c1 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -4024,10 +4024,10 @@
     return getAlpha() > 0.0f || hasBlur();
 }
 
-void Layer::onPostComposition(const DisplayDevice* display,
-                              const std::shared_ptr<FenceTime>& glDoneFence,
-                              const std::shared_ptr<FenceTime>& presentFence,
-                              const CompositorTiming& compositorTiming) {
+void Layer::onCompositionPresented(const DisplayDevice* display,
+                                   const std::shared_ptr<FenceTime>& glDoneFence,
+                                   const std::shared_ptr<FenceTime>& presentFence,
+                                   const CompositorTiming& compositorTiming) {
     // mFrameLatencyNeeded is true when a new frame was latched for the
     // composition.
     if (!mBufferInfo.mFrameLatencyNeeded) return;