Integrating RandomMusicPlayer sample into tree.

This is a cherrypick of CL 112174 (originally written for
honeycomb-mr1) into the honeycomb-mr2 branch. Original CL:
https://android-git.corp.google.com/g/#change,112174

Patch Set 2: ammending to fix spaces in title (as suggsted by smain@)

Change-Id: I1c6e2f4f3585bb65f9f87342445e21f27bed242d