Android: shorten QEMU Extended Keys string

...for English as well.

Author: bk138

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

@@ -30,7 +30,7 @@
 
 <string name="info">Connection Info</string>
 <string name="meta_key_title">Send Key Combo</string>
-<string name="send_qemu_extended_keys_title">QEMU Extended Keys</string>
+<string name="send_qemu_extended_keys_title">QEMU Ext. Keys</string>
 <string name="new_connection">New Connection</string>
 <string name="nickname_caption">Bookmark</string>
 <string name="discovered_servers">Discovered Servers</string>