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
edb7de2923