mecha: add support of aosp serial

Change-Id: I0d5d1fb116ecf00a61f536540cae605cf19cc2fd
glacier-panel: fixup compiler warnings

Change-Id: I9dd3c8f4a422430f6eb6d42ba07d98da7d5f9c7d
Merge "glacier-panel: fixup compiler warnings" into jellybean