[Pod] Add all public methods of TableLogBuffer to interface.

Previously, TableLogBuffer's interface only had the methods used by the
plugin library. But to move TableLogBuffer to a pod, we need all its
public methods to be part of the interface.

Bug: 307607958
Flag: EXEMPT refactor
Test: m SystemUI-core
Test: m SystemUISharedLib
Change-Id: I3d1cb9cb99b0fbb9da58816fda7c371d9d567eb8