Update input monitor configuration sequence

Update input monitor configuration sequence

[Bug]           Input monitor detected double-pressing, which caused errors.
[Cause]         Some systems already used double-press as a pattern.
[Solution]      Change input sequence from double press to triple press.
[Verification]  Build, install, run SCS with -l TRACE.
                Run journalctl --unit=security-containers --follow -l
                Press "HOME" key three times quickly - you should see entries:
                  "Event sequence detected"
                  "Input monitor detected pattern"
                  "switchingSequenceMonitorNotify() called"

Change-Id: I52850851f1c72326d50b796d651886c7eec3406c
Signed-off-by: Lukasz Kostyra <l.kostyra@samsung.com>