qdutils: Add display config to qdutils

This API is meant for system level users that need to get/set
various display attributes that are normally not available via
the regular Android framework channels.
Initially the APIs exposed are to check HDMI status, get display
attributes and set HSIC data.
Only physically connected displays are supported for now.

Change-Id: Ia783ce2ab0c4599a54c992171e01e2f0504550dc
hwc: Calculate viewframe from layers display frame information.

Calculate view frame of  each display from the displayframe of all
the application layers.

Change-Id: I9ba4076b7b4419bd3559417fad28b4e1de6acff3