Merge from Widevine repo of http://go/wvgerrit/24043
This CL simplifies the way the oemcrypto dynamic adapter handles
backwards compatibility while looking up old function pointers.
It also puts in guards for functions that do not have pointers.
Current Level 3 libraries merged from http://go/wvgerrit/23686/
level3/arm64/libwvlevel3.a Level3 Library 7283 Feb 15 2017 13:39:10
level3/mips64/libwvlevel3.a Level3 Library 7285 Feb 15 2017 13:51:12
level3/arm/libwvlevel3.a Level3 Library 4445 Feb 15 2017 14:20:04
level3/x86_64/libwvlevel3.a Level3 Library 7284 Feb 15 2017 13:43:04
level3/x86/libwvlevel3.a Level3 Library 4464 Feb 15 2017 14:14:55
level3/mips/libwvlevel3.a Level3 Library 4465 Feb 15 2017 14:10:04
Test: OEMCrypto Unit tests pass on bullhead, fugu, and all
six emulators. A bullhead was crippled to use L3 only, and
Play Movies worked OK. ExoPlayer tests were also run on the
bullhead. L1 was re-installed on the bullhead, and Play Movies and
ExoPlayer tests were repeated with no problems.
Bug: 18949752
Bug: 31458046
Change-Id: I8668fde1ce8a045c71bf33c566f3ff86e11821c5
27c01e82b5