aaudio: Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

BUG: 161896447
Test: all changes are in comments, so just build
Change-Id: I53a4a4c2ade03dcde940e6611f7e6b46d12ffe71

Change-Id: I90ebaea4731c6ca95f312b2176792d50dea862ad
5 files changed