Backfill owner information for VTS module VtsHalSoundtriggerV2_3TargetTest.

Each VTS module is required to have OWNERS file. The ownership is based on
go/vts-owners. For more information about ownership policy, please visit
go/xts-owners-policy.

Test: Tree Hugger
Bug: 143903671
Change-Id: I3cefca5ede8f0ec500155dbf15ef91ea71812824
diff --git a/soundtrigger/2.3/vts/functional/OWNERS b/soundtrigger/2.3/vts/functional/OWNERS
new file mode 100644
index 0000000..3c24468
--- /dev/null
+++ b/soundtrigger/2.3/vts/functional/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 48436
+elaurent@google.com
+mdooley@google.com
+ytai@google.com