Flag equals/hashCode changes in AudioMix

Bug: 328173922
Test: atest AudioMixTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:a96eaff73ba3ed3c83a79ee9c4df4af76a74508d)
Merged-In: Ifba8672a61e7ee456365bfce66379e2de5031f43
Change-Id: Ifba8672a61e7ee456365bfce66379e2de5031f43
1 file changed