Make StatusBarService.clearNotificationEffects oneway

This doesn't need to be blocking (as far as me and a colleague can tell)
and was causing ANRs.

Bug: 204160836
Test: tbd
Change-Id: I16f7e20ddbcdb7546038273aede545a920fce87e
(cherry picked from commit 340cf6fdadeba13c0cc2dd75f4434bcf94321c67)
1 file changed