Camera3: Add support for face detection

1. Expose maximum number of faces via capabilites.
2. Add new parameter/metadata field for face detection mode.

Change-Id: I6505ab7558cc50f815211df71f70ec1989ce6785
2 files changed
tree: 8af195a65394df2efc1b7c3187abba82479f902c
  1. camera/