Moved secure_input protocol and auxiliary code to libteeeui

Add secure input protocol as auxiliary protocol.
Add evdev.h/.cpp which adds an event loop and code for processing key
events from linux event devices.
Add abstract interface for implementing a simple secure input method
that can be used by HAL implementations.

Bug: 146078942
Bug: 118834716
Test: N/A
Change-Id: Ide567ffa8f9e48b65768e191718096ba6c9b562e
6 files changed