Revert "Use TREBLE_TESTING_OVERRIDE only in FMQ unit test client."

The flag is required to enable the FMQ unit test client to
find the test service.

Bug: 63825555
Test: fmq_test

This reverts commit a40834ee2028b183ba919de395dcb944f563333e.

Change-Id: I4b9289f2b3a43a9721558860cdbdba017e28f0e5
2 files changed