Revert "audio: allow standby for direct track" am: eeb744f5f9 am: 1910616e2e am: dac1d1dc3f am: 15eb8167ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/11901472

Change-Id: Ieefeba461da1e18f3d3af12278f772fb98728ce0