RMX1921: audio: Add hotword input for hotword mic concurrency

Bug: 126595113
Bug: 129733664
Bug: 133123985
Bug: 130316160

Test:
 (ST: sound trigger, VO: VoIP, PH: phone call,
  NR: media recording, PL: playback music)
 ST->VO (MO/MT),  ST->PH (MO/MT)
 ST->NR->PH (MO/MT), ST->NR->VO (MO/MT)
 ST->PL->PH (MO/MT), ST->PL->VO (MO/MT)
 ST->NR->PL->PH (MO/MT),  ST->NR->PL->VO (MO/MT)

Change-Id: I11513994c7a34364de38e00fc8ff999efe3dbb6c
Signed-off-by: Jasmine Cha <chajasmine@google.com>
Signed-off-by: kaderbava <ksbava7325@gmail.com>