Fix issue #22479881: Nexus 6 randomly rebooting every few hours with...

..."FATAL EXCEPTION IN SYSTEM PROCESS"

Synchronous calls out of the system process are bad, m'kay?

This should be a safe change because the only place I see calling
this interface are within the system process where there is clearly
no other dependency on ordering.

Change-Id: I483b07cfd68d00d74797784c2a75012e8dd67141

core/java/com/android/internal/widget/IRemoteViewsAdapterConnection.aidl

@@ -19,7 +19,7 @@ package com.android.internal.widget;
 import android.os.IBinder;
 
 /** {@hide} */
-interface IRemoteViewsAdapterConnection {
+oneway interface IRemoteViewsAdapterConnection {
     void onServiceConnected(IBinder service);
     void onServiceDisconnected();
 }