Cast Receiver integration test

Merge from Widevine repo of http://go/wvgerrit/169471

Remove the test in android tests and add it to the
core tests.

Bug: 276464340
Test: GTEST_FILTER="CorePIGTest.CastReceiverProvisioning*" jenkins/run_fake_l1_tests
Change-Id: Icd280b532ddae274f66b2fab3e65520e96adb7cb

libwvdrmengine/cdm/core/test/test_base.h

@@ -88,6 +88,7 @@ class TestCdmEngine : public CdmEngine {
   TestCdmEngine(wvutil::FileSystem* file_system,
                 std::shared_ptr<metrics::EngineMetrics> metrics)
       : CdmEngine(file_system, metrics) {}
+  const CdmSession* GetCdmSession(std::string sessionId) const;
 };
 
 class WvCdmTestBaseWithEngine : public WvCdmTestBase {