46eecb6b80d15b52dc2988e5d12181211f3449a7
[ Merge from http://go/wvgerrit/69105 ] This adds a metric collecting decorator class around cdm engine. This implementation uses a templated decorator. The decorator enables: 1) Wrapping the CDM Engine methods to capture timing and error information. 2) Allows use of a mock CDM Engine for testing. Test: Unit tests. GPlay manual testing and GTS tests. BUG: http://b/64724336 Change-Id: I5e4a0f552974fab1939bc7ab02719a1f5849cf3f
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