audio: Update OWNERS

Add missing OWNERS files for default implementation and
utilities code.

Remove krocard@, add ytai@ to ST HAL default implementations.

Test: N/A
Change-Id: I22734cd7382c0988d0c6001164deb775e9ae55c0
diff --git a/soundtrigger/2.0/default/OWNERS b/soundtrigger/2.0/default/OWNERS
index 6fdc97c..ed739cf 100644
--- a/soundtrigger/2.0/default/OWNERS
+++ b/soundtrigger/2.0/default/OWNERS
@@ -1,3 +1,3 @@
 elaurent@google.com
-krocard@google.com
 mnaganov@google.com
+ytai@google.com