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/DominatorTree.cpp b/tools/aapt2/DominatorTree.cpp
index 118a385..ff18033 100644
--- a/tools/aapt2/DominatorTree.cpp
+++ b/tools/aapt2/DominatorTree.cpp
@@ -19,8 +19,9 @@
 #include <algorithm>
 
 #include "android-base/logging.h"
+#include "androidfw/ConfigDescription.h"
 
-#include "ConfigDescription.h"
+using ::android::ConfigDescription;
 
 namespace aapt {