I rewrote some of the problematic scripts to use an event loop which
fixed most of the issues but it turns out the underlying issue is
that when the device is under load the timeout that detects a repeat press
makes the key a repeat press and we miss the initial press completely
due to being under load and under the gun
Adds entries for PLA_EXIT and PLA_CANCEL with a Repeat press
Change-Id: I8247b0ebd37fc58608f6be126c49e56f8375e9cf