Clean up test strings

- Mark everything untranslatable to avoid TC confusion

Change-Id: Iea43b0f5f63253833d91aeaa11b3c463cd170741
Fixes: 65355069
Test: builds
diff --git a/tests/unit/res/values/strings.xml b/tests/unit/res/values/strings.xml
index 9fb98f9..35e201a 100644
--- a/tests/unit/res/values/strings.xml
+++ b/tests/unit/res/values/strings.xml
@@ -14,18 +14,18 @@
      limitations under the License.
 -->
 
-<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+<resources>
     <!-- Test only. Do not translate. -->
     <!-- Test only. Do not translate. -->
     <!-- Test only. Do not translate. -->
-    <string name="enable">Enable</string>
-    <string name="discoverable">Discoverable</string>
-    <string name="start_scan">Start scan</string>
-    <string name="stop_scan">Stop scan</string>
-    <string name="operator_hello">Hello Operator!</string>
-    <string name="operator_settings_title">Operator</string>
-    <string name="operator_settings_summary">Operator hook that can be used to start activity of choice</string>
-    <string name="manufacturer_hello">Hello Manufacturer!</string>
-    <string name="manufacturer_settings_title">Manufacturer</string>
-    <string name="manufacturer_settings_summary">Manufacturer hook that can be used to start activity of choice</string>
+    <string name="enable" translatable="false">Enable</string>
+    <string name="discoverable" translatable="false">Discoverable</string>
+    <string name="start_scan" translatable="false">Start scan</string>
+    <string name="stop_scan" translatable="false">Stop scan</string>
+    <string name="operator_hello" translatable="false">Hello Operator!</string>
+    <string name="operator_settings_title" translatable="false">Operator</string>
+    <string name="operator_settings_summary" translatable="false">Operator hook that can be used to start activity of choice</string>
+    <string name="manufacturer_hello" translatable="false">Hello Manufacturer!</string>
+    <string name="manufacturer_settings_title" translatable="false">Manufacturer</string>
+    <string name="manufacturer_settings_summary" translatable="false">Manufacturer hook that can be used to start activity of choice</string>
 </resources>