Don't create RenderThread for dumpsys gfxinfo

Change-Id: I4cbad14ad6f952ddec11eb732701909fd75ff137
Fixes: 121129527
Test: guess
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index aa6af23..23a0a2b0 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -244,8 +244,10 @@
 }
 
 void RenderProxy::dumpGraphicsMemory(int fd) {
-    auto& thread = RenderThread::getInstance();
-    thread.queue().runSync([&]() { thread.dumpGraphicsMemory(fd); });
+    if (RenderThread::hasInstance()) {
+        auto& thread = RenderThread::getInstance();
+        thread.queue().runSync([&]() { thread.dumpGraphicsMemory(fd); });
+    }
 }
 
 void RenderProxy::setProcessStatsBuffer(int fd) {