Replace hidden AudioManager.FLAG_FROM_KEY usage

This CL copies the hidden AudioManager.FLAG_FROM_KEY usage into
MediaUtils, and replace the usages with it.

Bug: 119790339
Test: mmm . (under frameworks/av/packages/MediaComponents)
Change-Id: I1a5ba5bc06e10fea9bf5fca0f88c8ca4f6ed2a7d
2 files changed