diag: dci: Add DCI support for APSS logs and events

Currently, Diag DCI only supports modem. Add DCI functionality
to support logs and events generated on the APSS processor.

Change-Id: I7b5dfe96240338b43761de00b59a25a85d0aadb6
Signed-off-by: Dixon Peterson <dixonp@codeaurora.org>