Add ImageReader to host build of libandroid_runtime

This adds android_media_ImageReader and related files to the host build
of libandroid_runtime. This requires updating some of the classes in
libhostgraphics that were missing some APIs.

Flag: NONE host-only change
Bug: 382086021
Test: m libandroid_runtime on host
Change-Id: I91036137bc0ff0da33b37b1bce4f646954006ebc