Revert "mm-video: port heap mask change to ion."

This reverts commit dfd125cc18d91a8630e69a0a05e5b28e7a00521b.
media: Better compatibility with new KGSL

 * Memset the params struct instead of initializing every value manually
   so that we don't have to deal with the flags/reserved change.

Change-Id: I0085d14e7f39304936534518a6adb9c8c9544b86
Revert "libstagefrighthw: fixup for kitkat"

This reverts commit a16556f6ab442446a1bf138b2cebc9d78804146c.
use the MetadataBufferType defined in frameworks/native

Change-Id: Ifb56622b7d0464e683882ef5b7c89e6dc5c8a097
Signed-off-by: Lajos Molnar <lajos@google.com>