Move StringPool to libandroidfw

Test: verified affected tests pass
Bug: 232940948
Change-Id: I22089893d7e5013f759c39ce190bec07fa6435db
diff --git a/tools/aapt2/cmd/Optimize_test.cpp b/tools/aapt2/cmd/Optimize_test.cpp
index ac681e8..d180c87 100644
--- a/tools/aapt2/cmd/Optimize_test.cpp
+++ b/tools/aapt2/cmd/Optimize_test.cpp
@@ -17,9 +17,9 @@
 #include "Optimize.h"
 
 #include "AppInfo.h"
-#include "Diagnostics.h"
 #include "LoadedApk.h"
 #include "Resource.h"
+#include "androidfw/IDiagnostics.h"
 #include "test/Test.h"
 
 using testing::Contains;