audio: Update ChildInterface to set scheduler policy lazily am: 780fefb3 am:...

audio: Update ChildInterface to set scheduler policy lazily am: 780fefb3 am: e35c2c83 am: 1a1a6731

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2674338



Change-Id: I68b7ec19d31c0acee2caf7b2d7ed48ae713ba536
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>