Revert "Convert audio/Android.mk to Android.bp" am: 455e2814ef am: 83ed7e6fb0 am: 10a0eece36

Original change: https://android-review.googlesource.com/c/device/linaro/poplar/+/1697525

Change-Id: I22055b92da8e1ba5514da327e4e691b43d60382d