Wait till next SYN_REPORT to repopulate device state after SYN_DROPPED

Currently, we repopulate device state immediately upon receiving a SYN_DROPPED
event. We should wait till the next SYN_REPORT event to query the device
state as it signals evdev client's event queue has now recovered from the
buffer overrun.

Test: atest inputflinger_tests
Bug: b/291626046
Change-Id: Ie02dbcb3d3fdc94deee67f1bc06e670c8cd9cd83