Add a service to handle postMessage callbacks to client

customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl

Index: customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl
diff --git a/customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl b/customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl
index c25c4f77df2e19766de42f4c7af77d1774a88964..32b6e9b44be98d930ba2f7fd60728362d7b00100 100644
--- a/customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl
+++ b/customtabs/src/android/support/customtabs/ICustomTabsCallback.aidl
@@ -23,8 +23,8 @@ import android.os.Bundle;
  * @hide
  */
 interface ICustomTabsCallback {
-    oneway void onNavigationEvent(int navigationEvent, in Bundle extras) = 1;
-    oneway void extraCallback(String callbackName, in Bundle args) = 2;
-    void onMessageChannelReady(in Uri origin, in Bundle extras) = 3;
+    void onNavigationEvent(int navigationEvent, in Bundle extras) = 1;
+    void extraCallback(String callbackName, in Bundle args) = 2;
+    void onMessageChannelReady(in Bundle extras) = 3;
     void onPostMessage(String message, in Bundle extras) = 4;
 }