audiopolicy: Match DIRECT and MMAP_NOIRQ flags exactly in IOProfile

Prevent selection of DIRECT and MMAP_NOIRQ output profiles
if these flags were not requested.

Update the test APM configuration to use PCM16 on all outputs,
so they are all equivalent in terms of format and only differ in flags.

Test: atest audiopolicy_tests
Change-Id: I6940caed519b6237ea3038e646a84e4403a0c1ed