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/ResourceDeduper_test.cpp b/tools/aapt2/optimize/ResourceDeduper_test.cpp
index d9f384c0..2e098ae 100644
--- a/tools/aapt2/optimize/ResourceDeduper_test.cpp
+++ b/tools/aapt2/optimize/ResourceDeduper_test.cpp
@@ -20,6 +20,7 @@
 #include "test/Test.h"
 
 using ::aapt::test::HasValue;
+using ::android::ConfigDescription;
 using ::testing::Not;
 
 namespace aapt {