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/test/Common.cpp b/tools/aapt2/test/Common.cpp
index 0fabbc4..b54c155 100644
--- a/tools/aapt2/test/Common.cpp
+++ b/tools/aapt2/test/Common.cpp
@@ -16,6 +16,8 @@
 
 #include "test/Common.h"
 
+using android::ConfigDescription;
+
 namespace aapt {
 namespace test {