Improve performance of AppsFilter#removePackage()

Basically, it updates all visibilities for packages sharing the same
uid on removePackage(). However, the calculated visibility for the uid
is always the same and it could take a lot of time if there are many
packages for the uid.

This CL calculates and updates visibility once only for a package among
them in case of sharedUserId.

Bug: 288223730
Test: atest PackageManagerServiceServerTests:AppsFilterImplTest
Change-Id: I2650e4aa50993ce814d4e90da7a3f16982e2e32c