SF: reset the idle timer if a frame is scheduled

There is a case where the idle timer might expire while SF is active
as it is not getting reset if SF was already scheduled from some other
reason.

Change-Id: If79b2df4f0fe56b70658a5495069a556d3fdfc79
Test: atest android.platform.test.scenario.sysui.bubble.ShowBubbleAndShowImeMicrobenchmark#testShowBubbleAndShowIme
Bug: 264952266