Add Shared License bit to key control block

Merge from widevine of http://go/wvgerrit/23184

This adds the shared license bit to the key control block for the
reference code and the unit tests.

b/31458046

Change-Id: I4e360ea5dd2e6cee145663d4ab4f384b65cac427

libwvdrmengine/oemcrypto/mock/src/oemcrypto_key_mock.h

@@ -15,6 +15,7 @@ const uint32_t kControlObserveDataPath = (1<<31);
 const uint32_t kControlObserveHDCP     = (1<<30);
 const uint32_t kControlObserveCGMS     = (1<<29);
 const uint32_t kControlRequireAntiRollbackHardware = (1<<28);
+const uint32_t kSharedLicense          = (1<<23);
 const uint32_t kControlSRMVersionRequired = (1<<22);
 const uint32_t kControlDisableAnalogOutput = (1<<21);
 const uint32_t kControlSecurityPatchLevelShift = 15;