Specify DRM certificate duration in tests.

[ Merge of http://go/wvgerrit/150350 ]

Certain integration tests were depending on the provisioning server
only sending short duration (~2 minute) certificates when testing
the CDM's ability to enforce expiration periods.  This behavior of
the server was not reliable, resulting in device test failures from
server behavior changes.

The DRM certificate provisioning server allows the requester to
optionally provide a desired certificate duration in the request
URL.  The tests which test the CDM's ability to enforce certificate
durations will now explicitly specify the certificate duration
required by the test.

Bug: 228547158
Test: request_license_test
Change-Id: Ib9ebfdba1451104be0e59baca0b2f23a94cd51e6

libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp

@@ -194,7 +194,7 @@ class MockCDM : public WvContentDecryptionModule {
                                                        std::string*), (override));
 
   MOCK_METHOD(CdmResponseType, HandleProvisioningResponse,
-      (const CdmIdentifier&, CdmProvisioningResponse&,
+      (const CdmIdentifier&, const CdmProvisioningResponse&,
                       wvcdm::RequestedSecurityLevel, std::string*, std::string*), (override));
 
   MOCK_METHOD(CdmResponseType, Unprovision, (CdmSecurityLevel,