Second OPK Partner Beta v16 Release

See https://developers.google.com/widevine/drm/client/opk
for documentation and an integration guide.

See CHANGELOG.md for details about recent changes.

util/test/test_sleep.h

@@ -41,6 +41,10 @@ class TestSleep {
   // verify this function does not roll back the clock used by OEMCrypto.
   static bool RollbackSystemTime(int seconds);
 
+  // Set the system clock to the specified time. This is only expected to work
+  // when real_sleep is false.
+  static void SetFakeClock(int64_t time_seconds);
+
   // Roll the system clock forward to undo all previous calls to
   // RollBackSystemTime. Returns true on success.
   static bool ResetRollback() {