Showing icons for apps on sdcard which are not available during system boot.

issue 15852084

Change-Id: I1e6f59a413581ae3af4219ab32cb5af3d726d382

src/com/android/launcher3/StartupReceiver.java

@@ -0,0 +1,15 @@
+package com.android.launcher3;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class StartupReceiver extends BroadcastReceiver {
+
+    static final String SYESTEM_READY = "com.android.launcher3.SYESTEM_READY";
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        context.sendStickyBroadcast(new Intent(SYESTEM_READY));
+    }
+}