AAPT2: Rename strip phase to optimize

- Allow resource deduping, version collapsing, and sparse resource
  encoding.

Test: manual
Change-Id: Ia4aa892ab5b06ba1d5ea4a6efb51b00bc3a980c4
diff --git a/tools/aapt2/link/Link.cpp b/tools/aapt2/link/Link.cpp
index 0162461..4905216 100644
--- a/tools/aapt2/link/Link.cpp
+++ b/tools/aapt2/link/Link.cpp
@@ -46,6 +46,8 @@
 #include "link/ManifestFixer.h"
 #include "link/ReferenceLinker.h"
 #include "link/TableMerger.h"
+#include "optimize/ResourceDeduper.h"
+#include "optimize/VersionCollapser.h"
 #include "process/IResourceTableConsumer.h"
 #include "process/SymbolTable.h"
 #include "proto/ProtoSerialize.h"