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/cmd/Optimize.cpp b/tools/aapt2/cmd/Optimize.cpp
index 47288ec..328b0be 100644
--- a/tools/aapt2/cmd/Optimize.cpp
+++ b/tools/aapt2/cmd/Optimize.cpp
@@ -22,6 +22,7 @@
 #include "android-base/file.h"
 #include "android-base/stringprintf.h"
 
+#include "androidfw/ConfigDescription.h"
 #include "androidfw/ResourceTypes.h"
 #include "androidfw/StringPiece.h"
 
@@ -47,6 +48,7 @@
 
 using ::aapt::configuration::Abi;
 using ::aapt::configuration::OutputArtifact;
+using ::android::ConfigDescription;
 using ::android::ResTable_config;
 using ::android::StringPiece;
 using ::android::base::ReadFileToString;