Test cleanup

Test cleanup

Fix bug in QueryEffect test - was not re-initializing the name length.
Add QueryEffect test for over-writing the name buffer.
Don't create output with VOLUME or NULL interfaces.
Use <stdlib.h> symbolic names for exit codes instead of 0 and 1.
Remove Android-style logging from examples; use only printf.
Remove extra blank lines in test output.
Remove the MAX_NUMBER_OUTPUT_DEVICES macro.
Use <unistd.h> to declare usleep.
Remove obsolete #include statements.
Fix build warnings.

Change-Id: I8d198a317246b3894f104edf7c9f317a51593d07