onContentReloading

The renderer is reloading content or running a live resume-seek (active true) and has finished (active false). Forwarded to BreakScheduler.setContentReloading so the transient positions the player reports meanwhile are not read as a DVR seek-back that would re-arm the break just finished. Timebase-agnostic, unlike onContentResumeSeek; mirrors the web onContentReloading. Default no-op.