android: import libcamera_metadata from Android goog/nyc-mr1-arc branch

BUG=b:36919374
TEST=emerge-<board> arc-camera3-libcamera_metadata

Change-Id: I213dd0a4f17d233504a1088d561a9597fd912ded
Reviewed-on: https://chromium-review.googlesource.com/484121
Commit-Ready: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Ricky Liang <jcliang@chromium.org>
10 files changed