Cleanup flag "send_hover_events_based_on_event..."

Full flag name:
"send_hover_events_based_on_event_stream"

Bug: b/314251047
Test: atest FrameworksServicesTests:TouchExplorerTest
Flag: EXEMPT flag cleanup
Change-Id: I6c6c3be62a7fdfe3cebf05be0fc8d61e9b8e5c05
1 file changed