Copy data in HotwordAudioStream ParcelFileDescriptors

Bug: 244595867
Test: TODO - Manual E2E test for now, CTS tests later
Change-Id: I02050cc39146e93e9dca1f3db6e0b5b894e85dd6
Merged-In: I02050cc39146e93e9dca1f3db6e0b5b894e85dd6
4 files changed