hlte: Add custom audio_effects.conf

 * Enable offload for visualizer

Change-Id: I9a0a40ca45f8f901901283179eab18f1e70e54ae
hlte: Enable SIM hotswap

 * Even though this isn't possible due to the battery location, it
   is possible for an invalid SIM to cause a persistent modal
   dialog to be presented upon boot. This works around it.

Change-Id: Iac6c6727abc570bb5a48c18e79e8b8dd424d4254