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.cpp

@@ -59,6 +59,8 @@ KeyControlBlock::KeyControlBlock(
     LOGD("  nonce:    %08X", nonce());
     LOGD("  magic:    %08X", verification());
     LOGD("  bits:     %08X", control_bits());
+    LOGD("  bit kSharedLicense %s.",
+         (control_bits() & kSharedLicense) ? "set" : "unset");
     LOGD("  bit kControlSRMVersionRequired %s.",
          (control_bits() & kControlSRMVersionRequired) ? "set" : "unset");
     LOGD("  bit kControlDisableAnalogOutput %s.",