Use libstatssocket_lazy to report stylus metrics

Report stylus prediction metrics using libstatssocket_lazy
as an interim solution while I working on untangling the
build dependency issues (b/338106546) that prevent us from using
libstatslog within libinput.

Test: `adb reboot`, then `adb logcat | egrep -i "statssocket|MotionPredictor"`
  → Shows no bootanimation linker error, and no other errors

Test: `statsd_testdrive -d 3000 718`, then draw with stylus
  → Shows reasonable metrics logged

Bug: 338106546
Bug: 311066949

Change-Id: I05ae5ffdd774d0b25cb7b2435015245d5f712c01