Move allocateBuffers to RT

Such that it gets executed after setSurface, in order that
mReqUsage has the correct flags set.

Test: Take trace, ensure that allocateBuffers actually allocates
in the right format/usage by ensuring that dequeueBuffer doesn't
trash them immediately again.
Bug: 111517695
Change-Id: I94b402d7b29d565155a77a2d09106246261712d2
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 59048be..0207611 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -87,6 +87,11 @@
             [ this, surf = surface ]() mutable { mContext->setSurface(std::move(surf)); });
 }
 
+void RenderProxy::allocateBuffers(const sp<Surface>& surface) {
+    mRenderThread.queue().post(
+            [ surf = surface ]() mutable { surf->allocateBuffers(); });
+}
+
 void RenderProxy::updateSurface(const sp<Surface>& surface) {
     mRenderThread.queue().post(
             [ this, surf = surface ]() mutable { mContext->setSurface(std::move(surf)); });