caimito: config serial no for vendor audio

note:
    - To workaround microphone compensation issue, serial
      number is necessary information.
      Config the value for vendor audio service.

Test: end-to-end test
Bug: 349276230
Flag: EXEMPT bugfix

Change-Id: Ia989fe39cf89055bb056e07875cc868edb808bdc

conf/init.komodo.rc

@@ -83,3 +83,7 @@ on property:sys.boot_completed=1
 # it should be written by the system init.
 on property:ro.boot.hardware.sku=GQ57S
     setprop audio.camerasound.force true
+
+# Check serial no. from specific KM4 devices for audio.
+on property:ro.boot.serialno=*
+    setprop vendor.audio_hal.device.serialno ${ro.boot.serialno}