Some linux commands depend on /sys/devices/system/cpu/possible, such
as 'lscpu'.
Add 2 knobs for cpu:
/sys/devices/system/cpu/possible
/sys/devices/system/cpu/online
Both the values are '0 - Kernel.ApplicationCores()-1'.
Change-Id: Iabd8a4e559cbb630ed249686b92c22b4e7120663
PiperOrigin-RevId: 209070163
We have been unnecessarily creating too many savable types implicitly.
PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8