See this thread
com.samsung.android.apps.wearable.recent
here are some other commonly used:-
com.samsung.android.shealthmonitor Health Monitor
com.samsung.android.watch.cameracontroller Camera Controller
com.samsung.android.watch.findmyphone Find My Phone
com.samsung.android.watch.flashlight Flashlight
com.samsung.android.watch.alarm Alarm
com.samsung.android.mediacontroller Media Controller
com.samsung.android.gallery.watch Gallery
com.samsung.android.dialer Dialer
com.android.vending Playstore Watch
com.google.android.apps.maps Maps
Try running simple adb commands
adb connect 192.168.xxx.xxx:5555 (your watch IP address & enable debugging)
adb shell
pm list packages
You will get an output list like this
package:com.android.cts.priv.ctsshim
package:com.google.android.ext.services
package:com.android.providers.telephony
com.samsung.android.wear.shealth/com.samsung.android.wear.shealth.app.heartrate.view.HeartRateActivity
Hope this helps,
Ron
Samsung Developer Relations