AAPT2: Move format related files under same directory

Test: make aapt2_tests
Change-Id: Id72cdfc12ba3add294048e60c55f2461344464bf
diff --git a/tools/aapt2/optimize/MultiApkGenerator.cpp b/tools/aapt2/optimize/MultiApkGenerator.cpp
index 8e4b82c..6803088 100644
--- a/tools/aapt2/optimize/MultiApkGenerator.cpp
+++ b/tools/aapt2/optimize/MultiApkGenerator.cpp
@@ -27,8 +27,8 @@
 #include "configuration/ConfigurationParser.h"
 #include "filter/AbiFilter.h"
 #include "filter/Filter.h"
-#include "flatten/Archive.h"
-#include "flatten/XmlFlattener.h"
+#include "format/Archive.h"
+#include "format/binary/XmlFlattener.h"
 #include "optimize/VersionCollapser.h"
 #include "process/IResourceTableConsumer.h"
 #include "split/TableSplitter.h"
diff --git a/tools/aapt2/optimize/MultiApkGenerator_test.cpp b/tools/aapt2/optimize/MultiApkGenerator_test.cpp
index e8e6adc..c8f3524 100644
--- a/tools/aapt2/optimize/MultiApkGenerator_test.cpp
+++ b/tools/aapt2/optimize/MultiApkGenerator_test.cpp
@@ -25,8 +25,8 @@
 #include "ResourceTable.h"
 #include "configuration/ConfigurationParser.h"
 #include "filter/Filter.h"
-#include "flatten/Archive.h"
-#include "flatten/TableFlattener.h"
+#include "format/Archive.h"
+#include "format/binary/TableFlattener.h"
 #include "process/IResourceTableConsumer.h"
 #include "test/Context.h"
 #include "test/Test.h"