Remove the xliff attributes from the sample_text translatable string.

android/res/values/strings.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+<resources>
   <!--
         Source: Activity title.
         Description: Title for the Settings activity.
@@ -64,7 +64,7 @@
         Source: Spoken aloud.
         Description: Sample text spoken aloud when the user is trying out a language.
     -->
-  <string name="sample_text">This is a sample of text spoken in <xliff:g>%s</xliff:g></string>
+  <string name="sample_text">This is a sample of text spoken in %s</string>
   <!--
         Source: Variant preference labels.
         Description: Labels for possible voice variant/gender/age values.