Migrate StatsManager to apex

Link frameworks-statsd.jar against framework-all
since it is currently infeasible to to link against stubs

Linking against stubs in frameworks/base cannot be done because
we still have StatsLog that calls StatsEvent.getBytes which
is a hidden API.

We can't move StatsLog to the apex because of hidden APIs in the
autogenerated code which is currently being migrated.

Test: m -j
Bug: 147923515
Change-Id: I0a59dce83a8075bdde3e72d1d8eceef2ed572791