Allow untrusted apps to be client of the DSP HAL server

Allow untrusted APK to be a client of the DSP HAL server on user
builds.

Change-Id: I20b7ac551a66d6e02a09d0a283209ae14786066b
Signed-off-by: Vamsi Krishna Gattupalli <quic_vgattupa@quicinc.com>