cameraserver: Add support for hiding secure cameras.

Bug: 123046494

Test: Sanity -> GCA
Test: Hardcode all cameras hidden, AImageReaderVendorTest passes, GCA
      cannot find cameras.

Change-Id: I7780751101c660e47d84627ec191f43d268f1aa9
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>
6 files changed