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.h b/libs/hwui/renderthread/RenderProxy.h
index ad534f0..0d29b4b 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -70,6 +70,7 @@
     ANDROID_API void setName(const char* name);
 
     ANDROID_API void initialize(const sp<Surface>& surface);
+    ANDROID_API void allocateBuffers(const sp<Surface>& surface);
     ANDROID_API void updateSurface(const sp<Surface>& surface);
     ANDROID_API bool pauseSurface(const sp<Surface>& surface);
     ANDROID_API void setStopped(bool stopped);