Revert "audio: allow standby for direct track" am: eeb744f5f9 am: a19e52def2 am: 039ab6908d

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

Change-Id: If0059c7becd8ad5b784d367585de5bfc03e3b616