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

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

Change-Id: Ife84a181e763bb19bab24acadfc8a4c8f29c74dc
Reviewed-on: https://chromium-review.googlesource.com/475310
Commit-Queue: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
Trybot-Ready: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Hung-yu Wu <hywu@chromium.org>
10 files changed