Mark framesequence test app strings as untranslatable

bug:12445874
Change-Id: Icf8356cc643698fea2eee686edaf772d74680e91
(cherry picked from commit 052fc0abbfc7f339b2283ae6497febd6e03f0340)
diff --git a/framesequence/samples/RastermillSamples/res/values/strings.xml b/framesequence/samples/RastermillSamples/res/values/strings.xml
index 8b85b8e..811c979 100644
--- a/framesequence/samples/RastermillSamples/res/values/strings.xml
+++ b/framesequence/samples/RastermillSamples/res/values/strings.xml
@@ -1,12 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
+    <!-- NOTE: all strings should be marked as translatable=false,
+         since this sample app is for testing, and won't be shipped -->
 
-    <string name="app_name">Rastermill Samples</string>
-    <string name="action_settings">Settings</string>
+    <string name="app_name" translatable="false">Rastermill Samples</string>
+    <string name="action_settings" translatable="false">Settings</string>
 
-    <string name="start">start</string>
-    <string name="stop">stop</string>
-    <string name="vis">vis</string>
-    <string name="invis">invis</string>
+    <string name="start" translatable="false">start</string>
+    <string name="stop" translatable="false">stop</string>
+    <string name="vis" translatable="false">vis</string>
+    <string name="invis" translatable="false">invis</string>
 
 </resources>