libandroidfw: move ConfigDescription from aapt2 to libandroidfw

This is to allow idmap2 to access ConfigDescription.

Test: libandroidfw_tests
Test: aapt2_tests
Change-Id: I54210bbbd8dad5903cb7100807df977efa394ad5
Merged-In: I54210bbbd8dad5903cb7100807df977efa394ad5
diff --git a/tools/aapt2/ResourceUtils.cpp b/tools/aapt2/ResourceUtils.cpp
index 560077c..82d9e04 100644
--- a/tools/aapt2/ResourceUtils.cpp
+++ b/tools/aapt2/ResourceUtils.cpp
@@ -31,6 +31,7 @@
 #include "util/Util.h"
 
 using ::aapt::text::Utf8Iterator;
+using ::android::ConfigDescription;
 using ::android::StringPiece;
 using ::android::StringPiece16;
 using ::android::base::StringPrintf;