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/ResourceTable_test.cpp b/tools/aapt2/ResourceTable_test.cpp
index 1aa9751..05c6f15 100644
--- a/tools/aapt2/ResourceTable_test.cpp
+++ b/tools/aapt2/ResourceTable_test.cpp
@@ -24,6 +24,7 @@
 #include <ostream>
 #include <string>
 
+using ::android::ConfigDescription;
 using ::android::StringPiece;
 using ::testing::Eq;
 using ::testing::NotNull;