AAPT2: Accept Java unicode identifiers

Test: make aapt2_tests
Change-Id: I75a0e52d43b1785001bfe120eea7484f7bb4682b
diff --git a/tools/aapt2/Android.bp b/tools/aapt2/Android.bp
index 46c0ff0..14d05fd 100644
--- a/tools/aapt2/Android.bp
+++ b/tools/aapt2/Android.bp
@@ -111,11 +111,12 @@
         "proto/TableProtoDeserializer.cpp",
         "proto/TableProtoSerializer.cpp",
         "split/TableSplitter.cpp",
+        "text/Unicode.cpp",
+        "text/Utf8Iterator.cpp",
         "unflatten/BinaryResourceParser.cpp",
         "unflatten/ResChunkPullParser.cpp",
         "util/BigBuffer.cpp",
         "util/Files.cpp",
-        "util/Utf8Iterator.cpp",
         "util/Util.cpp",
         "ConfigDescription.cpp",
         "Debug.cpp",