libandroidfw: move ConfigDescription from aapt2 to libandroidfw

This is to allow idmap2 to access ConfigDescription.

Test: libandroidfw_tests
Test: aapt2_tests
Change-Id: I54210bbbd8dad5903cb7100807df977efa394ad5
diff --git a/tools/aapt2/optimize/MultiApkGenerator.cpp b/tools/aapt2/optimize/MultiApkGenerator.cpp
index e92c121..8c9c434 100644
--- a/tools/aapt2/optimize/MultiApkGenerator.cpp
+++ b/tools/aapt2/optimize/MultiApkGenerator.cpp
@@ -20,6 +20,7 @@
 #include <regex>
 #include <string>
 
+#include "androidfw/ConfigDescription.h"
 #include "androidfw/StringPiece.h"
 
 #include "LoadedApk.h"
@@ -44,6 +45,7 @@
 using ::aapt::configuration::OutputArtifact;
 using ::aapt::xml::kSchemaAndroid;
 using ::aapt::xml::XmlResource;
+using ::android::ConfigDescription;
 using ::android::StringPiece;
 
 /**