ANDROID: GKI: perf: Add fields for CPU hotplug feature

Pull in the ABI diff changes for the CPU hotplug feature. The full
feature can be found in commit 3d3eb5fb ("perf: add hotplug
support").

Bug: 148872640
Test: compile test
(cherry picked from commit 3d3eb5fb)
[willmcvicker: Only cherry-picked the ABI difference]
Signed-off-by: Will McVicker <willmcvicker@google.com>
Change-Id: I41982f50bcda29e4659f3ec0ffd4517884a7b6d0