dsp: fix mute for AptX Adaptive A2DP streaming

Only load depacketizer module for aptx_adaptive and ldac playback
use-case during dynamic load of BT modules, decoder module loading
not required. 

Change-Id: If7ec559f5cc7ff428b8e0e4fac1f34e7f2469c8e
Signed-off-by: Harshal Ahire <hahire@codeaurora.org>