Make ISmartspaceManager non-blocking

Methods from this manager are being called from the SystemUI main
thread, and hitting system_server locks.
All methods return void, and are already using a callback mechanism,
we can make this oneway.

Fixes: 220718061
Test: Deployed on Phone,CTS tests
Change-Id: Ief549fce0d2463547cade4028696cf9431ce3a84

core/java/android/app/smartspace/ISmartspaceManager.aidl

@@ -26,7 +26,7 @@ import android.content.pm.ParceledListSlice;
 /**
  * @hide
  */
-interface ISmartspaceManager {
+oneway interface ISmartspaceManager {
 
     void createSmartspaceSession(in SmartspaceConfig config, in SmartspaceSessionId sessionId,
             in IBinder token);