Reconnect CEC HAL callback

When the HAL service crashes, reconnect to the HAL with retries and
ensure that the callback is reconnected as well.

Bug: 167649125
Test: make; flash; kill cec hal process and ensure CEC messages are
still sent and received afterwards

Change-Id: I5686f5dcf50c8f8bf67533596c39ac697f1e7263
1 file changed