PowerManagerService: Fix updating of mUserActivitySummary

I7f1fc35a1573717d1ea101a07c4171d6f66d1553 missed the fact that the primary
purpose of the affected condition block was to update mUserActivitySummary
and the button/keyboard light handling was just appended to it later.

This fixes the waking from dream/screensaver by user activity.

I30c5c8c9c09e3d57ace18cac72b783510b9b3bf3 is removed here as well as it was
just a band aid.

jira: NIGHTLIES-1285

Change-Id: I6b2f6c58e73110787d62e86d4d2ef538638cf491