Introduce "adb shell dpm force-security-logs"

This command fetches the most recent batch of the logs
and makes them available to the DPC. Primary purpose is
to make security logging testable in CTS without having
to either wait for 2 hours or relying on implementation
details.

To prevent the user from abusing the command and
annoying the DPC, it is throttled if run more than once
per 10 seconds. Waiting happens in Dpm command.

Test: adb shell dpm force-security-logs
Bug: 70886042
Bug: 62251154
Change-Id: Ic5acd5a3e5c3b060881385c472df2b972961b626