Rework blast sync callback model

The previous code waited for a frame complete callback from hwui before
notifying WMS that a draw had occurred. However, frame complete callback
was not guaranteed to get called since it only invokes a callback if a
draw actually occured. VRI really needs a signal that RT has completed,
since it just needs to know that a draw was possible so it can notify
WMS that the RT completed its pass.

Instead, rename frameCompleteCallback to frameCommitCallback since that
API is exposed to a public API when a frame was actually drawn.
Create a new callback, frameCompleteCallback, that is invoked when the
draw has completed, regardless if a frame was actually drawn.

When the frameCompleteCallback is invoked, VRI can check to see if a new
frame actually drew. VRI can call into BBQ to see if the frame acquired
matches the frame that was attempted to draw. If so, VRI can wait on a
transaction callback. If not, it can allow VRI to continue. In either case,
it will notify WMS that the draw has finished.

Test: Split over and over
Bug: 195262673
Change-Id: I24dd19ab2746be3fc33e597761abf8c5249f8b5b
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index bb0b135..0cd6ffb 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -492,10 +492,10 @@
         // Notify the callbacks, even if there's nothing to draw so they aren't waiting
         // indefinitely
         waitOnFences();
-        for (auto& func : mFrameCompleteCallbacks) {
-            std::invoke(func, mFrameNumber);
+        for (auto& func : mFrameCommitCallbacks) {
+            std::invoke(func, false /* didProduceBuffer */);
         }
-        mFrameCompleteCallbacks.clear();
+        mFrameCommitCallbacks.clear();
         return 0;
     }
 
@@ -604,10 +604,10 @@
 #endif
 
     if (didSwap) {
-        for (auto& func : mFrameCompleteCallbacks) {
-            std::invoke(func, frameCompleteNr);
+        for (auto& func : mFrameCommitCallbacks) {
+            std::invoke(func, true /* didProduceBuffer */);
         }
-        mFrameCompleteCallbacks.clear();
+        mFrameCommitCallbacks.clear();
     }
 
     if (requireSwap) {