Index TTS-Settings and dedupe TTS-engine in search result.

Fixes: 63022866
Test: robotests
Change-Id: I5c711e7bafba4e413ee271768c58742be05d8640
diff --git a/src/com/android/settings/search/SearchIndexableResources.java b/src/com/android/settings/search/SearchIndexableResources.java
index c20d2a0..d67e8eb 100644
--- a/src/com/android/settings/search/SearchIndexableResources.java
+++ b/src/com/android/settings/search/SearchIndexableResources.java
@@ -81,6 +81,7 @@
 import com.android.settings.support.SupportDashboardActivity;
 import com.android.settings.system.ResetDashboardFragment;
 import com.android.settings.system.SystemDashboardFragment;
+import com.android.settings.tts.TextToSpeechSettings;
 import com.android.settings.tts.TtsEnginePreferenceFragment;
 import com.android.settings.users.UserSettings;
 import com.android.settings.wallpaper.WallpaperTypeSettings;
@@ -199,6 +200,7 @@
                 R.drawable.ic_devices_other);
         addIndex(EnterprisePrivacySettings.class, NO_DATA_RES_ID, R.drawable.ic_settings_about);
         addIndex(PaymentSettings.class, NO_DATA_RES_ID, R.drawable.ic_settings_nfc_payment);
+        addIndex(TextToSpeechSettings.class, NO_DATA_RES_ID, R.drawable.ic_settings_accessibility);
         addIndex(
                 TtsEnginePreferenceFragment.class, NO_DATA_RES_ID, R.drawable.ic_settings_language);
         addIndex(LockscreenDashboardFragment.class, R.xml.security_lockscreen_settings,