UinputRecordingIntegrationTests: Extend device lifetime to avoid racing

To avoid race conditions between the injection of the last event and the
processing of the device hangup, we will avoid terminating the uinput
shell command until the test successfully verifies that all events are
received.

To get around an unexpected behavior of the uinput command in
interactive mode, we inject an extra sync event at the end of the evemu
recording playback.

Bug: 366612213
Test: atest UinputRecordingIntegrationTest
Flag: TEST_ONLY
Change-Id: I021b26ec628711466ddaa3f1c21ff0caf315d1e1