Upgrade L3 to v16 and update android makefiles [DO NOT MERGE]
Merging CL:
https://widevine-internal-review.googlesource.com/c/cdm/+/108203
and
https://widevine-internal-review.git.corp.google.com/c/cdm/+/103904 (changes to the L3 source files are excluded)
Generated L3 v16 for Android and added ODK dependency required by L3 v16.
Test: Unit tests on gLinux
jenkins/linux_unit_tests
jenkins/ce_cdm_tests
Test: Unit tests on Pixel 4(flame-userdebug, rvc-qpr-dev)
vendor/widevine/libwvdrmengine/build_and_run_all_unit_tests.sh
Test: Manual ExoPlayer playback tests on Pixel 4(flame-userdebug) for L1 and L3
WV: Secure HD/SD (cenc,MP4,H264)
WV: Secure HD/SD (cbc1,MP4,H264)
WV: Secure HD/SD (cbcs,MP4,H264)
Test: Widevine GTS tests(bramble-userdebug, rvc-qpr-dev)
https://android-build.googleplex.com/builds/tests/view?invocationId=I35000006266076664&testResultId=TR45714199883476235
(Note: the two failures are due to GTS/http issue and not related/specific to L3 and the change)
Bug: 136317881
Bug: 139814713
Change-Id: If3d4999ca3b725eab76c41588f202beec3873928
2f08c48e94