AAPT2: Move format related files under same directory

Test: make aapt2_tests
Change-Id: Id72cdfc12ba3add294048e60c55f2461344464bf
diff --git a/tools/aapt2/cmd/Compile.cpp b/tools/aapt2/cmd/Compile.cpp
index 0690dc1..a5e6aefd1 100644
--- a/tools/aapt2/cmd/Compile.cpp
+++ b/tools/aapt2/cmd/Compile.cpp
@@ -35,12 +35,12 @@
 #include "compile/Png.h"
 #include "compile/PseudolocaleGenerator.h"
 #include "compile/XmlIdCollector.h"
-#include "flatten/Archive.h"
-#include "flatten/XmlFlattener.h"
+#include "format/Archive.h"
+#include "format/binary/XmlFlattener.h"
+#include "format/proto/ProtoSerialize.h"
 #include "io/BigBufferOutputStream.h"
 #include "io/FileInputStream.h"
 #include "io/Util.h"
-#include "proto/ProtoSerialize.h"
 #include "util/Files.h"
 #include "util/Maybe.h"
 #include "util/Util.h"