Revert "Listen for foreground AppOps changes"

This reverts commit 7370c844.

Top VOIP apps rely on the ability to record audio in the background
without capabilities. Fix breaks top CUJs, needs to be re-evaluated.

Reason for revert: b/285898282, b/268724205

Bug: 268724205
Test: Manual verification of Meet
Change-Id: Ie2b57f5d2247b6f771e1f6095e993d749ad685f9