Add RestartEvent in Filter

Restart event would be sent when a filter is reconfigured and
restarted.

After stopping to reconfigure the filter, all the filter events
should be discarded until restart and receive the start event
from the newly configured filter.

Test: atest android.media.tv.tuner.cts
Bug: 172593389
Change-Id: I1c7c4391d8477ae191e318b1830dd8afed86ed87