Add policy handling for v16

[ Merge of http://go/wvgerrit/93865 ]

This allows for handling of timer and clock values as supported when both
the license service and the OEMCrypto on the device support v16.
A flag based on a value in the SignedResponse license indicates
whether this support should be enabled. A new class PolicyTimerV16
performs the duration value evaluation.

Bug: 139372190
Test: Android WV unit/integration tests
Change-Id: Iacbbd51ad26c9f29cb5418ff832f8822982644b7

libwvdrmengine/cdm/core/include/policy_engine.h

@@ -58,7 +58,8 @@ class PolicyEngine {
   // an exact copy of the policy information stored in the license.
   // The license state transitions to kLicenseStateCanPlay if the license
   // permits playback.
-  virtual void SetLicense(const video_widevine::License& license);
+  virtual void SetLicense(const video_widevine::License& license,
+                          bool supports_core_messages);
 
   // Used to update the currently loaded entitled content keys.
   virtual void SetEntitledLicenseKeys(
@@ -66,7 +67,8 @@ class PolicyEngine {
 
   // SetLicenseForRelease is used when releasing a license. The keys in this
   // license will be ignored, and any old keys will be expired.
-  virtual void SetLicenseForRelease(const video_widevine::License& license);
+  virtual void SetLicenseForRelease(const video_widevine::License& license,
+                                    bool supports_core_messages);
 
   // Call this on first decrypt to set the start of playback.
   virtual bool BeginDecryption(void);