Proper English orthography

Signed-off-by: Sébastien Toque <xilasz@gmail.com>

vlc-android/res/values/strings.xml

@@ -25,8 +25,8 @@
     <string name="append_all">Append all</string>
     <string name="pause">Pause</string>
     <string name="close">Close</string>
-    <string name="not_show_again">"Don't show this Message again."</string>
-    <string name="beta_warning">This is a early alpha version\n(NOT STABLE!).</string>
+    <string name="not_show_again">"Don't show this message again."</string>
+    <string name="beta_warning">This is an early alpha version\n(NOT STABLE!).</string>
     <string name="info_title">Information</string>
     <string name="unknown_artist">Unknown Artist</string>
     <string name="unknown_album">Unknown Album</string>