Fix the TtsService.onGetDefaultVoiceNameFor behaviour.

android/eSpeakTests/src/com/reecedunn/espeak/test/TextToSpeechServiceTest.java

         assertThat(mService.onGetDefaultVoiceNameFor("eng", "", ""), is("en"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
         assertThat(mService.onGetDefaultVoiceNameFor("eng", "USA", ""), is("en-us"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en-us"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
         assertThat(mService.onGetDefaultVoiceNameFor("eng", "GBR", "scotland"), is("en-sc"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en-sc"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
         assertThat(mService.onGetDefaultVoiceNameFor("eng", "USA", "rp"), is("en-us"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en-us"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
         assertThat(mService.onGetDefaultVoiceNameFor("eng", "", "scotland"), is("en"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
-        assertThat(mService.onGetDefaultVoiceNameFor("eng", "FRA", "rp"), is("en-uk-rp"));
+        assertThat(mService.onGetDefaultVoiceNameFor("eng", "FRA", "rp"), is("en"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en-uk-rp"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
-        assertThat(mService.onGetDefaultVoiceNameFor("eng", "FRA", ""), is("en-uk-rp"));
+        assertThat(mService.onGetDefaultVoiceNameFor("eng", "FRA", ""), is("en"));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
         assertThat(mService.getActiveVoice(), is(notNullValue()));
-        assertThat(mService.getActiveVoice().name, is("en-uk-rp"));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
 
         assertThat(mService.onGetDefaultVoiceNameFor("ine", "", ""), is(nullValue()));
         checkLanguage(mService.onGetLanguage(), "vie", "VNM", "saigon");
-        assertThat(mService.getActiveVoice(), is(nullValue()));
+        assertThat(mService.getActiveVoice(), is(notNullValue()));
+        assertThat(mService.getActiveVoice().name, is("vi-sgn"));
     }
 }

android/src/com/reecedunn/espeak/TtsService.java

         }
     }
 
+    private Pair<Voice, Integer> getDefaultVoiceFor(String language, String country, String variant) {
+        final Pair<Voice, Integer> match = findVoice(language, country, variant);
+        switch (match.second) {
+            case TextToSpeech.LANG_AVAILABLE:
+                return new Pair<>(findVoice(language, "", "").first, match.second);
+            case TextToSpeech.LANG_COUNTRY_AVAILABLE:
+                return new Pair<>(findVoice(language, country, "").first, match.second);
+            default:
+                return match;
+        }
+    }
+
     @Override
     protected int onIsLanguageAvailable(String language, String country, String variant) {
         final Pair<Voice, Integer> match = findVoice(language, country, variant);
 
     @Override
     public String onGetDefaultVoiceNameFor(String language, String country, String variant) {
-        final int result = onIsLanguageAvailable(language, country, variant);
-        switch (result) {
-            case TextToSpeech.LANG_MISSING_DATA:
-            case TextToSpeech.LANG_NOT_SUPPORTED:
-                return null;
-        }
-        return mMatchingVoice.name;
+        final Voice match = getDefaultVoiceFor(language, country, variant).first;
+        return (match == null) ? null : match.name;
     }
 
     @Override