Migrate testBinderStats to CtsStatsdAtomHostTestCases

This CL is part of a larger goal to decentralize statsd atom CTS tests
and migrate them to either the CTS module of the team owning the atom or
a new module named CtsStatsdAtomHostTestCases. We hope doing so
increases the frequency at which tests are run, decreases test
breakages, and clearly delineates test ownership. More information about
this project can be found at go/statsd-cts-decentralization-doc.

This CL serves as an example for how to migrate tests from
CtsStatsdHostTestCases to CtsStatsdAtomHostTestCases.

StatsdCtsForegroundActivity.java was copied and not moved from
CtsStatsdHostTestCases because non-atom tests use those activities as
well.

Test: atest CtsStatsdAtomHostTestCases
Test: m CtsStatsdHostTestCases
Bug: 161803108
Change-Id: I1ce36befe243b513a22fc06d6fe23342a3d2060e