play music when headphones are plugged again

Status changed to 'Confirmed' because the bug affects multiple users.

Reasoning behind this:
I often knock the earphone jack out while listening to music, so it
would be nice if it resumed playing, when the earphones are plugged back
in within 10 seconds or so. Rather than me having to dig the phone out
of my pocket and set it playing again. I can't imagine a use case where
the earphones would be plugged back in within a few seconds and I don't
want it to continue playing.

This would be performed in media-hub and not the music-app, therefore marking the music-app as invalid.

Why the condition on X seconds?

I have an Android phone that can start and stop playing automatically as I (un)plug headphones and when I just want to listen to music the screen doesn't even have to turn on. This is incredibly useful.

Maybe as a configurable option it could start autoplaying with no time condition, but this should not be default. Otherwise I could play music on the bus to lectures, unplug the headphones pausing the music, then when I go the library later I may want to listen a podcast, so I plug my headphones back in and suddenly music starts playing! Or maybe a few days later I plug my phone into a sound system for a party and then the incorrect music starts playing (ABBA may not be appropriate for a student party...).