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Merge from Widevine repo of http://go/wvgerrit/55462 Instead of calling dlclose on liboemcrypto.so after each terminate, this CL keeps the library loaded. Although the original bug b/72831885 has been fixed, there is still some lingering worry about possible hard-to-find resource leaks in dlclose. For more context, see the discussion around the original bug b/72831885. The fix that closed this bug has more discussion: https://boringssl-review.googlesource.com/c/boringssl/+/25784 In particular, we only fixed a known resource leak in boringssl, not in any other libraries, and we added a patch that the borringssl team was not very happy to include because it was not very thread safe. bug: http://b/72831885 d2i_PKCS8_PRIV_KEY_INFO_bio returns null test: unit tests on taimen. Change-Id: I73b5e69bf300e03fe567b8e7e1d8e0e08b6bca37