Remove public API methods from hiddenapi-light-greylist.txt

A change in `hiddenapi` now correctly classifies public methods
inherited from package-private classes into public classes as
public API. Remove the corresponding entries from light greylist,
they are now in the whitelist.

Bug: 76424618
Test: m appcompat
Change-Id: Ibdfb2512dfbd6d33ec0a3f6f44338b6f4864e2f5