tree a9815270c24095917dc4e929f0992aac2ee5f56b
parent 963f71444bc955b946106e7e8028c69b73286d60
author Lajos Molnar <lajos@google.com> 1470146825 -0700
committer gitbuildkicker <android-build@google.com> 1474957319 -0700

DO NOT MERGE: IOMX: work against metadata buffer spoofing

- Prohibit direct set/getParam/Settings for extensions meant for
  OMXNodeInstance alone. This disallows enabling metadata mode
  without the knowledge of OMXNodeInstance.
- Use a backup buffer for metadata mode buffers and do not directly
  share with clients.
- Disallow setting up metadata mode/tunneling/input surface
  after first sendCommand.
- Disallow store-meta for input cross process.
- Disallow emptyBuffer for surface input (via IOMX).
- Fix checking for input surface.

Bug: 29422020
Change-Id: I801c77b80e703903f62e42d76fd2e76a34e4bc8e
(cherry picked from commit 7c3c2fa3e233c656fc8c2fc2a6634b3ecf8a23e8)