Raise SurfaceControlFpsListener to System API.

Previously the SurfaceControlFpsListener is a hidden API which only
allows platform code access. This patch renames it to follow the
callback convention and raises it to be a system API in order to allow
system applications to access the FPS count of a task and its children.
The FPS count access is guarded by a permission ACCESS_FPS_COUNTER.

To follow the API convention and properly check the permission, the
register/unregister callback APIs are moved to WindowManager and
permission check is done in the System Server.

Minor: Rename to SurfaceControlFpsCallback to TaskFpsCallback in order
to follow the API naming convention.

Bug: b/199920468
CTS-Coverage-Bug: b/199920468
Test: atest TaskFpsCallbackTest
Change-Id: I6b0a0ad6500278b3da09059e9c2ede28d9a743aa