Add flag to narrow the meaning of JANK_PERCEPTIBLE.

When the jank_perceptible_narrow flag is set, JANK_PERCEPTIBLE is
determined based on a much more narrow scope of process states instead
of whether the process is cached or not.

Bug: 304837972
Flag: android.app.jank_perceptible_narrow
Test: Device boots, MPTS memhog test with jank_perceptible_narrow set.
Change-Id: I0e0ac21c65a3b03a4927a1fd0a67df7045959d75