[ Merge of http://go/wvgerrit/122613 ]
Further log clean up in the core CDM code.
- Changed several INFO logs to DEBUG and VERBOSE
- Added more identifiers to the DEBUG logs to help match resource
associations
- Added more enum-to-string functions
- Unknown enum values will be formatted to contain their numeric
value
Key areas improved are the UsageTableHeader and CdmSession.
Bug: 183576879
Test: CE CDM unittests
Change-Id: I2d11e714d419e0736d3e2f7a7668e8d36d7ef449
0579fe805e