Rename keyboard XML files

* Slavic to East Slavic
* Serbian to South Slavic
* Scandinavian to Nordic

Bug: 6150183
Change-Id: I8f5641aa07b83cbb225f5fd73e351a6f8abe0784
diff --git a/java/res/xml/method.xml b/java/res/xml/method.xml
index 8b1a3ef..f330b26 100644
--- a/java/res/xml/method.xml
+++ b/java/res/xml/method.xml
@@ -20,9 +20,46 @@
 <!-- The attributes in this XML file provide configuration information -->
 <!-- for the Input Method Manager. -->
 
-<!-- Keyboard: en_US, en_GB, ar, be, bg, cs, da, de, de(QWERTY), el, es, es_US, et, fi, fr, fr_CA,
-     fr_CH, hr, hu, it, iw, ka, ky, lt, lv, mk, nb, nl, pl, pt, ro, ru, sk, sl, sr, sv, tr, uk,
-     vi -->
+<!-- Supported locales: name/layout
+    ar: Arabic/arabic
+    be: Belarusian/east_slavic
+    bg: Bulgarian/bulgarian
+    cs: Czech/qwertz
+    da: Danish/nordic
+    de: German/qwertz
+    de_ZZ: German (QWERTY)/qwerty
+    el: Greek/greek
+    en_US: English United States/qwerty
+    en_GB: English Great Britain/qwerty
+    es: Spanish/spanish
+    et: Estonian/nordic
+    fi: Finnish/nordic
+    fr: French/azerty
+    fr_CA: French Canada/qwerty
+    fr_CH: French Switzerland/qwertz
+    hr: Croatian/qwertz
+    hu: Hungarian/qwertz
+    it: Italian/qwerty
+    iw: Hebrew/hebrew
+    ka: Georgian/georgian
+    ky: Kyrgyz/east_slavic
+    lt: Lithuanian/qwerty
+    lv: Latvian/qwerty
+    mk: Macedonian/south_slavic
+    nb: Norwaian Bokmål/nordic
+    nl: Dutch/qwerty
+    pl: Polish/qwerty
+    pt: Portuguese/qwerty
+    ro: Romanian/qwerty
+    ru: Russian/east_slavic
+    sk: Slovak/qwerty
+    sl: Slovenian/qwerty
+    sr: Serbian/south_slavic
+    sv: Swedish/nordic
+    tr: Turkish/qwerty
+    uk: Ukrainian/east_slavic
+    vi: Vietnamese/qwerty
+    -->
 <!-- TODO: use <lang>_keyboard icon instead of a common keyboard icon. -->
 <!-- If IME doesn't have an applicable subtype, the first subtype will be used as a default
      subtype.-->