ANDROID: GKI: sched: add task boost vendor fields to task_struct

Adds vendor fields for task boosting in task_struct.

Signed-off-by: Will McVicker <willmcvicker@google.com>
[willmcvicker: pulled in ABI changes only]
Bug: 149816871
Bug: 147895101
Test: compile, verify ABI diff
Change-Id: I96acc4d5e47499c0e32e341caddec2140c13e5a8
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
Signed-off-by: blong <blong@codeaurora.org>
(cherry picked from commit 7ed681a974a76ded6b7fdda59785a899ef2e40a2)