ANDROID: GKI: cpuhotplug: adding hotplug enums for vendor code

Needed to align the enum lists with vendor expectations.

(cherry picked from various)
Signed-off-by: Mark Salyzyn <salyzyn@google.com>
Bug: 154120209
Change-Id: I71fe27297db4352ef9f4b87db978dc2d6e8e0bc8