openSession_1_1 should return error for wrong security level

Currently, if requestedLevel is not the same as the
current security level, openSession_1_1 still returns
Status::OK, we should return an error status.

Merged from http://go/wvgerrit/95507

Test: unit test
  adb shell LD_LIBRARY_PATH="/vendor/lib64" /data/nativetest/libwvdrmdrmplugin_hidl_test

Bug: 150407669

Change-Id: I5673ac7bbe7a234ddd07bb9c145135486fb9e583

libwvdrmengine/mediadrm/test/WVDrmPlugin_test.cpp

@@ -402,7 +402,7 @@ TEST_F(WVDrmPluginTest, OpensSessions_1_1) {
 
   plugin.openSession_1_1(android::hardware::drm::V1_1::SecurityLevel::SW_SECURE_CRYPTO,
       [&](Status status, hidl_vec<uint8_t> hSessionId) {
-    ASSERT_EQ(Status::OK, status);
+    ASSERT_EQ(Status::ERROR_DRM_INVALID_STATE, status);
     sessionId.clear();
     sessionId.assign(hSessionId.data(), hSessionId.data() + hSessionId.size());
   });