Fix: app_name is not translatable

app/src/main/res/values/strings.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">SSTV Encoder</string>
+    <string name="app_name" translatable="false">SSTV Encoder</string>
     <string name="action_pick_picture">Pick Picture</string>
     <string name="action_take_picture">Take Picture</string>
     <string name="action_save_wave">Save as WAVE File</string>