Escape single quotes in aapt2

Using #normalizeForOutput to normalize a string for output in order
to escape some special char.

Fix: 140373430
Test: atest libaapt_tests aapt2_tests
Change-Id: Ic49dbaaccd8e4b1c51a87de9f0e2e5f4a8da7d3d
diff --git a/tools/aapt2/xml/XmlDom.cpp b/tools/aapt2/xml/XmlDom.cpp
index 8b7eadf9..dd60f17 100644
--- a/tools/aapt2/xml/XmlDom.cpp
+++ b/tools/aapt2/xml/XmlDom.cpp
@@ -349,7 +349,8 @@
         size_t len;
         const char16_t* str16 = tree.getText(&len);
         if (str16) {
-          text->text = util::Utf16ToUtf8(StringPiece16(str16, len));
+          text->text =
+              ResTable::normalizeForOutput(util::Utf16ToUtf8(StringPiece16(str16, len)).c_str());
         }
         CHECK(!node_stack.empty());
         node_stack.top()->AppendChild(std::move(text));