Remove enabled flag use_visible_requested_for_process_tracker Bug: 414269923 Flag: EXEMPT flag removal Test: BackgroundActivityLaunchTest Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:01358ba370c7fe020dfbe4328ae65ac3997de6f5 Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:68417f0d05b24a0bd959171bca34cd218b42fa40 Merged-In: I61169d7adafbb8c43a9a1e97fe963cfe50bb90ad Change-Id: I61169d7adafbb8c43a9a1e97fe963cfe50bb90ad