Fix procstats CTS tests

- testProcessStateTopDuration
This test is removed because duration_millis in ProcessStatsStateProto
is deprecated as of ag/9863822, which made this test obsolete.

- testProcessStateCachedEmptyDuration
This test is removed because duration_millis in ProcessStatsStateProto
is deprecated as of ag/9863822, which made this test obsolete.

- testProcessStateByPulling
Removed checks for duration_millis, pss, uss which are deprecated as of
ag/9863822.

Test: atest CtsStatsdHostTestCases
Bug: 148542701
Change-Id: Id30aa51b4907269bff558459ddb416c74f13fc9a