uapi: add support for ADSP Generic Detection Event

ADSP detection engine module can raise Generic Detection Event to
provide variable payload data based on the information requested by
userspace. Adding required structs and macros in the LSM UAPI header
file to expose them to userspace.

Change-Id: I454fb26b53f821310b5138a0ed9f1cbe516e63c3
Signed-off-by: Xiaoyu Ye <benyxy@codeaurora.org>