DO NOT MERGE: Delete IMSLifecycleTest#testOnStartInputCalledOnce

The test had been flaky due to inherent design. These tests
were re-written & migrated from host side to device side in P.
Hence we can safely remove them from O.

Bug: 74340797
Test: cts-tradefed run singleCommand cts-dev -m CtsInputMethodServiceHostTestCases
Change-Id: I17e015ad20cbfe3d8fc59f5205cca9756a7b9f36
3 files changed