Validate the display ID before processing any calls from the
client. This is needed to handle only the displays which are
supported by HWC
Adapted from commit of the same title in CAF msm8974 tree.
Original author: Arun Kumar K.R <akumarkr@codeaurora.org>
Change-Id: Iebeeabf791b5c53e811e1f4bb3d777ab0e4d0f47