blue-common: cleanup audio flags

This flags aren't enabled and probably not needed since nobody complained so far.
https://github.com/Kali-/android_hardware_qcom_audio-caf/blob/cm-10.1/alsa_sound/Android.mk#L32

While merging Kali's repo with CM repo i've reenabled those flags which might cause issues for us:
https://github.com/codeworkx/android_hardware_qcom_audio-caf/blob/cm-10.1/alsa_sound/Android.mk#L32

Let's disable them.

Change-Id: I41c4bcaa63ff774325da3e2c46d75c1a175fb857