GitLab

Implement LoadSession and RemoveSession for FuchsiaCdm:

LoadSession -> fuchsia CDM::LoadLicenseSession
RemoveSession -> fuchsia LicenseSession::GenerateLicenseRelease

Bug: internal b/162078899
Test: https://storage.googleapis.com/m3u8_lag/persistent_license/index.html
Change-Id: I151645ecaee800979690bd47936cc27584322acb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373403
Commit-Queue: Yuchen Liu <yucliu@chromium.org>
Reviewed-by: Xiaohan Wang <xhwang@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828039}