Support deprecated language codes.

Locale.toLanguageTag will transform the obsolete (and
deprecated) language codes "in", "ji" and "iw" to
"id", "yi" and "he" respectively.

All versions of android prior to "L" used the deprecated
language tags, so we will need to support them for backwards
compatibility.

bug: 13230947

Change-Id: Ib63567786bcbe780ceb0487d8f583b75a5452aea

core/java/android/content/res/Resources.java

@@ -1625,7 +1625,7 @@ public class Resources {
 
             String locale = null;
             if (mConfiguration.locale != null) {
-                locale = localeToLanguageTag(mConfiguration.locale);
+                locale = adjustLanguageTag(localeToLanguageTag(mConfiguration.locale));
             }
             int width, height;
             if (mMetrics.widthPixels >= mMetrics.heightPixels) {
@@ -1712,6 +1712,41 @@ public class Resources {
         return locale.toLanguageTag();
     }
 
+    /**
+     * {@code Locale.toLanguageTag} will transform the obsolete (and deprecated)
+     * language codes "in", "ji" and "iw" to "id", "yi" and "he" respectively.
+     *
+     * All released versions of android prior to "L" used the deprecated language
+     * tags, so we will need to support them for backwards compatibility.
+     *
+     * Note that this conversion needs to take place *after* the call to
+     * {@code toLanguageTag} because that will convert all the deprecated codes to
+     * the new ones, even if they're set manually.
+     */
+    private static String adjustLanguageTag(String languageTag) {
+        final int separator = languageTag.indexOf('-');
+        final String language;
+        final String remainder;
+
+        if (separator == -1) {
+            language = languageTag;
+            remainder = "";
+        } else {
+            language = languageTag.substring(0, separator);
+            remainder = languageTag.substring(separator);
+        }
+
+        if ("id".equals(language)) {
+            return "in" + remainder;
+        } else if ("yi".equals(language)) {
+            return "ji" + remainder;
+        } else if ("he".equals(language)) {
+            return "iw" + remainder;
+        } else {
+            return languageTag;
+        }
+    }
+
     /**
      * Update the system resources configuration if they have previously
      * been initialized.