bootanimation: Move the bootanimation playaudio code

Move the bootanimation playaudio code, so that the audio plays
after the boot animation, because the audio manager is not ready and races
with the boot animation, if they the audio and boot animation play
together and makes the boot animation stutter.

SAMOSA-10

Change-Id: I56ab19ec06a4af2de84916cdc330e646dd5a8695
(cherry picked from commit 9ccd0254)