This cleans up the unit tests and update them to pass.
Cleaned up:
* removed the irrelevant bits.
* Used ScopedTempDir for all test specific files (instead of the current
directory).
* Update some objects to make them more easily testable.
* Group all the test in a single binary and use bionic's test runner.
BUG: 23682444
Change-Id: I289e3a5ff89968fdecd4a156e93bc38bbc25f58b
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
Bertrand SIMONNET