Allow OfflineLicenseRenewal test to be repeatedly invoked

[ Merge of http://go/wvgerrit/25720 ]

Test: Repeatedly invoke WvCdmRequestLicenseTest.OfflineLicenseRenewal

b/28915200

Change-Id: I5be6be02d09ced1a7ba8bac2c8706f199d063db8

libwvdrmengine/cdm/test/request_license_test.cpp

@@ -2075,6 +2075,9 @@ TEST_F(WvCdmRequestLicenseTest, StreamingLicenseRenewalProhibited) {
 }
 
 TEST_F(WvCdmRequestLicenseTest, OfflineLicenseRenewal) {
+  Unprovision();
+  Provision(kLevelDefault);
+
   // override default settings unless configured through the command line
   std::string key_id;
   std::string client_auth;