Add libnativebridge test to CTS for API coverage.

It so far only tests a subset of the API, due to problems with the test
setup in tradefed (b/189484095).

Also fix bitrot in so that the host tests find their DSO

Test: m cts cts-tradefed
      cts-tradefed run commandAndExit cts \
        --module art_libnativebridge_cts_tests
Test: atest art_libnativebridge_cts_tests
Test: art/libnativebridge/tests/
Bug: 208431683
Change-Id: I359b12bb79e104e0179e8cbf62f91b3e700d9d6c
2 files changed