Make aapt2 terminology more inclusive

Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code
for reference

Bug: 162364131
Bug: 162536543
Test: aapt2_tests
Change-Id: I4eef925d6319b40a395fc8d59a3f2912a02ca03b
diff --git a/tools/aapt2/link/XmlCompatVersioner.cpp b/tools/aapt2/link/XmlCompatVersioner.cpp
index 20ebdc6..6937ca9 100644
--- a/tools/aapt2/link/XmlCompatVersioner.cpp
+++ b/tools/aapt2/link/XmlCompatVersioner.cpp
@@ -143,8 +143,8 @@
 
   // Iterate from smallest to largest API version.
   for (ApiVersion api : apis_referenced) {
-    std::set<ApiVersion> dummy;
-    versioned_docs.push_back(ProcessDoc(api, api_range.end, doc, &dummy));
+    std::set<ApiVersion> tmp;
+    versioned_docs.push_back(ProcessDoc(api, api_range.end, doc, &tmp));
   }
   return versioned_docs;
 }