Revert "sched: Remove vruntime from trace_sched_stat_runtime()"

This reverts commit 7f509457 which is
commit 5fe6ec8f upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: I435f8c72cc21869031db010916e9d656c305be3a
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>