Update git submodules

* Update packages/modules/StatsD from branch 'master'
  to a368d4479d1fee532666311424001435bc9965fb
  - Add annotation ids to StatsLog as @SystemApi.
    
    Prior to this change, the annotation ids are hardcoded at statsd's
    clients. Make them SystemApi so all clients can share these constants
    living inside statsd apex.
    
    Bug: 160938178
    Test: m
    Change-Id: I99d7d8659a6695ffdc73d6e69ad535c374ef735a
    
1 file changed