Remove userActivitySummary condition for inattentive sleep

User activity with flag USER_ACTIVITY_FLAG_NO_CHANGE_LIGHTS, as
triggered when a wakelock with flag ON_AFTER_RELEASE is released,
should not extend the time the device is awake when the inattentive
sleep timeout expires.

This change removes the userActivitySummary condition in
isBeingKeptFromInattentiveSleepLocked. When this method is called, we
have already checked that since last user activity, attentive_timeout
has expired, so checking userActivitySummary is not required.
When a user activity with USER_ACTIVITY_NO_CHANGE_LIGHTS extends the dim
timeout, the userActivitySummary condition prevented the device from
going to sleep.

Bug: 202090650
Test: atest PowerManagerServiceTests
Test: Set short attentive_timeout, autoplay a series of short YouTube
      videos, confirm the device goes to sleep after attentive_timeout
      has expired
Change-Id: I2bcf2e65757118b82df52cbcf57d5017a9ce72f5