Enhancement: add option to forward events only if the configured receiver is already started

[GoogleCodeExporter]

The issue is as follows:
you may use your car radio paired with bluetooth to output
messages from your phone navigation app. Unfortunately the radio responds
after each message from the phone with a media play command which causes
the configured media app starting up playing.(not sure whether this is a bug or 
a feature... it is like that)   
Disabling all apps for receiving media button events would be a solution but 
then you loose the opportunity to control your media player at all.
So my idea is t to check whether the configured app is already loaded and if 
so,then forward the button events. If not running do nothing. This behavior 
shall be selectable by an additional checkbox.

What version of the product are you using? On what version of android? On
what device?
I9300, Android 4.1.2

Original issue reported on code.google.com by ejaltm...@gmail.com on 29 Dec 2013 at 9:36

[GoogleCodeExporter]

I think it'd be better if I only show apps that are loaded in the selector 
screen. If you only have one app loaded, than it would jsut go to that one. If 
you have two open, then you can pick. 

Original comment by harleens...@gmail.com on 26 Jan 2014 at 7:36