Allow OEMCrypto v8 or v9

From Widevine CL:
https://widevine-internal-review.googlesource.com/#/c/9184/

This is some shim code that will load either an OEMCrypto
version 8 or version 9 library.  This should allow us
to test and run stable devices until all OEM's have
updated to version 9.

Android Level 3 library versions are:
level3/mips/libwvlevel3.a  Level3 Library Feb 27 2014 18:18:34
level3/x86/libwvlevel3.a  Level3 Library Feb 27 2014 18:22:14
level3/arm/libwvlevel3.a  Level3 Library Feb 27 2014 12:31:29

Change-Id: I82911e3b4d9056cf3c3ab2b47194fe81ac2776d9

libwvdrmengine/cdm/core/include/oemcrypto_adapter.h

@@ -34,6 +34,7 @@ OEMCryptoResult OEMCrypto_InstallKeybox(const uint8_t* keybox,
                                         SecurityLevel level);
 uint32_t OEMCrypto_APIVersion(SecurityLevel level);
 const char* OEMCrypto_SecurityLevel(SecurityLevel level);
+bool OEMCrypto_SupportsUsageTable(SecurityLevel level);
 }  // namespace wvcdm
 
 #endif  // OEMCRYPTO_ADAPTER_H_