libUMP: fix headers for newer mali driver

Change-Id: Ia81fa1949d04d809b4c5045269a70d7bab758f4a
libhdmi: add placeholders and update for hwcomposer compatibility

Change-Id: I592230db0d39527591981200fb7174d3926e9bbe
libHWCService: initial commit for hwcomposer dependency

This is just a placeholder dependency required for the HWC to run.

Change-Id: Icbfe8c0dde86e10400332f374ae27bcd9e22ae95