hal: enable sidetone after voice call usecase routing

In voice call, during device switch from headset to handset
sidetone is enabled first and then routing. Due to which wsa881x
is configured before coming out of reset state and hence no
audio on speaker. Change the sequence to resolve this.

CRs-Fixed: 1054544
Change-Id: I763a9d9f3c6fba7e1bcdad365671de8ad5d21677