Batch log access requests from same client

For multiple log access requests from the same client
(same UID + package name) within a short timeframe, show only one
confirmation prompt to the user.

When access has been approved/denied, further requests will
automatically be approved/denied until another timeout expires, after
which a new request will show a prompt again.

If the prompt is shown but the request isn't approved or denied within a
certain time, the client will automatically be denied access.

Moved the approve/decline methods out of ILogcatManagerService into a
local service, so that they can only be called from within the system
server.

Bug: 229976778
Test: atest FrameworksServicesTests:LogcatManagerServiceTest
Change-Id: I6a3f56bdcbb84e64b1b24e73476bd24f32b75f24