This CL:
* removes dead code.
* converts constants static fields into proper constants.
* converts to C++/libchrome some of the parsing logic.
BUG: 22953719
Change-Id: Ief01178c6c268f8ae3690ad9deef42cfb43b2b75
MODULE_LICENSE_BSD and NOTICE were removed as the license is no longer
different from the rest of system/core.
BUG: 23086670
Change-Id: I1e83ef2ecb9c721150f8aab283c9ff960337da8c
This makes the import path less confusing:
* metrics/metrics_library.h is imported from the exported headers.
* metricsd/* for includes by the metrics daemon itself.
BUG: 22879597
Change-Id: I9f44ea3a548cae39d4546fcd724e8007f6dd4bd0