Fix leakage of ASurfaceTransactionCallback

The callback needs to set to null when thread renderer is destroyed.

Bug: 187419942
Bug: 186869429
Test: blaze test --test_strategy=local --test_arg=--device_broker_type=LOCAL_ADB_SERVER //javatests/com/google/android/testing/elizabot/internal/sanity/subscriptionleak:SubscriptionLeakTest_generic_phone_google_31_x86
Change-Id: Ic80c58f102ee5f21830542030021828f6231cc37
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index bba2207..718887b 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -195,6 +195,10 @@
 
     auto funcs = mRenderThread.getASurfaceControlFunctions();
 
+    if (surfaceControl == nullptr) {
+        setASurfaceTransactionCallback(nullptr);
+    }
+
     if (mSurfaceControl != nullptr) {
         funcs.unregisterListenerFunc(this, &onSurfaceStatsAvailable);
         funcs.releaseFunc(mSurfaceControl);