audio: Remove unnecessary std::move

Moving a temporary object prevents copy elision, and could reduce
performance.

This fixes -Wpessimizing-move compiler warning.

Test: presubmit
Bug: 154270751
Change-Id: Idb1a4abf4da9eb6dbe1e9a8fd66461d60985c8e1
diff --git a/audio/aidl/default/Module.cpp b/audio/aidl/default/Module.cpp
index 543efd1..c14d06e 100644
--- a/audio/aidl/default/Module.cpp
+++ b/audio/aidl/default/Module.cpp
@@ -391,7 +391,7 @@
 
 Module::Configuration& Module::getConfig() {
     if (!mConfig) {
-        mConfig = std::move(initializeConfig());
+        mConfig = initializeConfig();
     }
     return *mConfig;
 }