Adding tests for AudioAttribute AudioUsage converters

Bug: 171572311
Test: atest AudioAttributesTest
Change-Id: I5cb13331e1b6fcfdf13e0a5649f25c2cf9f5b0bf
Merged-In: I5cb13331e1b6fcfdf13e0a5649f25c2cf9f5b0bf
1 file changed