Add supportRtl to ext services application

* This allows the RTL support in the inline suggestion UI
  which is rendered in the ext services.

Test: manual
Bug: 151865005

Change-Id: I6766cce6b0c02131754e55ce4ef893559364071f
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 7587cc6..b8d34d2 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -41,7 +41,8 @@
     <application android:label="@string/app_name"
         android:defaultToDeviceProtectedStorage="true"
         android:forceQueryable="true"
-        android:directBootAware="true">
+        android:directBootAware="true"
+        android:supportsRtl="true">
 
         <service android:name=".storage.CacheQuotaServiceImpl"
              android:permission="android.permission.BIND_CACHE_QUOTA_SERVICE">