otter: Build OMX service

It's not being built by default for shipping API 34+

Change-Id: Id906a7700d1a61c8f9756a79cc91f1bf62ca9665
diff --git a/device.mk b/device.mk
index 490a175..084c314 100644
--- a/device.mk
+++ b/device.mk
@@ -235,6 +235,7 @@
 
 # OMX
 PRODUCT_PACKAGES += \
+    android.hardware.media.omx@1.0-service \
     libOmxAacEnc \
     libOmxAmrEnc \
     libOmxCore \