Merge from Widevine repo of http://go/wvgerrit/26521
This CL adds some missing logging when TraceOEMCryptoCalls is set.
Several SRM functions were not properly logged.
It also changes SelectKey from the TraceOEMCryptoCalls flag to the
TraceDecryptCalls. This reduces flooding the logs when content is
actually playing.
b/37751139
Change-Id: Ie92379dc295c83d8ec9bacb2445b1ef47377e4cf