Since an invalid argument to hostEndpointDisconnected should
be ignored by the HAL (and the Context Hub service), remove
the EX_ILLEGAL_ARGUMENT requirement in the Context Hub AIDL
HAL.
Bug: 216798253
Test: Compile
Change-Id: I83f08ccb998e6b494307de51f8709f3e0fbd2c99
Follow the pattern of using well-defined AIDL error codes as
return values for methods.
Bug: 213474931
Test: Compile, run VTS
Change-Id: If04d989cf504161638ec47b2302e60cbf32db502
Test check is too strict, since major/minor/patch version can be
zero independently.
Bug: 194285834
Test: Run test
Change-Id: I42bb1ae72312e7a10b16830306129f270199da18