hal: Set correct mono mode for TWS+.

Mono mode is reset during encoder configuration and wrong payload
value passes to ADSP.

After encoder configuration set tws mono mode value as sent by A2DP
during playback start.

CRs-Fixed: 2386942
Change-Id: I40f49addfa0f9dfceae9af2546512d0cca02fb99
1 file changed