Avoid NPD when re-initializing HAL fails

If the sensors HAL crashes or errors out during a test where we manually
re-run the environment setup function (e.g.
CleanupConnectionsOnInitialize), the pointer to the interface will
become null. Avoid dereferencing it by checking for nullness in the
per-test setup function and after each manual setup call. Also add a
death recipient to help identify instances where the HAL crashes during
a test.

Bug: 135638664
Test: run VTS on device where HAL crashes during above mentioned test
Change-Id: Iff7aa159c6b859272cfd18e7efb3ca431ea214fc