Inline notif pipeline flag in NotifRemoteInputMgr

This change is a no-op; the flag is now enabled-by-default, so all
removed code paths here are effectively dead.

Bug: 200269355
Test: atest SystemUITests
Change-Id: Ifa554b42821c35860add7f7538658c5a48384c66
Merged-In: Ifa554b42821c35860add7f7538658c5a48384c66
4 files changed