aaudio: merge contents of  AAudioDefinitions.h into AAudio.h

As requested by native API council.

Bug: 30210002
Bug: 33398120
Test: CTS test_aaudio
Change-Id: I5ea7c53d09469221263d84cf6f82082e67c2523b
Signed-off-by: Phil Burk <philburk@google.com>
30 files changed