moved LanguageUtils to Utils. + split getDeviceLanguage into Code (for string) and Locale for reuse as suggested in code review by @maxme

Author: mzorz

WordPressUtils/src/main/java/org/wordpress/android/util/LanguageUtils.java

@@ -0,0 +1,52 @@
+package org.wordpress.android.util;
+
+import android.content.Context;
+
+import java.util.Locale;
+
+/**
+ * Methods for dealing with i18n messages
+ */
+public class LanguageUtils {
+
+    public static Locale getCurrentDeviceLanguage(Context context) {
+        //better use getConfiguration as it has the latest locale configuration change.
+        //Otherwise Locale.getDefault().getLanguage() gets
+        //the config upon application launch.
+        Locale deviceLocale = context != null ? context.getResources().getConfiguration().locale : Locale.getDefault();
+        return deviceLocale;
+    }
+
+    public static String getCurrentDeviceLanguageCode(Context context) {
+        String deviceLanguageCode = getCurrentDeviceLanguage(context).toString();
+        return deviceLanguageCode;
+    }
+
+    public static String getPatchedCurrentDeviceLanguage(Context context) {
+        return patchDeviceLanguageCode(getCurrentDeviceLanguageCode(context));
+    }
+
+    /**
+     * Patches a deviceLanguageCode if any of deprecated values iw, id, or yi
+     */
+    public static String patchDeviceLanguageCode(String deviceLanguageCode){
+        String patchedCode = deviceLanguageCode;
+        /*
+         <p>Note that Java uses several deprecated two-letter codes. The Hebrew ("he") language
+         * code is rewritten as "iw", Indonesian ("id") as "in", and Yiddish ("yi") as "ji". This
+         * rewriting happens even if you construct your own {@code Locale} object, not just for
+         * instances returned by the various lookup methods.
+         */
+        if (deviceLanguageCode != null) {
+            if (deviceLanguageCode.startsWith("iw"))
+                patchedCode = deviceLanguageCode.replace("iw", "he");
+            else if (deviceLanguageCode.startsWith("in"))
+                patchedCode = deviceLanguageCode.replace("in", "id");
+            else if (deviceLanguageCode.startsWith("ji"))
+                patchedCode = deviceLanguageCode.replace("ji", "yi");
+        }
+
+        return patchedCode;
+    }
+
+}