Add transparent layer on HALO click
Clicking the HALO will launch a transparent activity for half a second.
Windows launched through a service didn't get halo'ed as we couldn't track the pendingIntent to add the floating flag. Now the window gets halo'ed as
there's a HALO layer already opened.
Transparent Layer Etc
https://github.com/ParanoidAndroid/android_frameworks_base/commit/94c54c33e8a9c2740c82e4ea8202c293afe217aa