Modify VTS error check so that the error code can be displayed

- Add AssertionResult in gtest to display logs
- Refactor all the error checks

- Replace INTERNAL_ERR with INVALID_ARGUMENT for
requestIsimAuthentication

Bug: 63760809
Bug: 65150146
Test: run vts
Change-Id: Id3d876ea515f47998e3e45be11db5edf306ffc24
17 files changed