Fix atom id annotation parsing

Bug: 152633444
Test: m -j cts && m -j CtsStatsdHostTestCases && cts-tradefed run
cts-dev -m CtsStatsdHostTestCases -t
android.cts.statsd.atom.UidAtomTests#testAudioState
Test: bit statsd_test:*

Change-Id: I167012330e431b38b86f190ca6b5d4f90995172f