Add live annotation for Computer.getProcessesForUid

PackageManagerServiceTest#testComputerStructure verify both structure
of Computer and ComputerEngine.
* Computer.getProcessesForUid should have the live annotation.
* PackageManagerServiceTest#testComputerStructure should skip static
  lambda function. a.k.a ComputerEngine.sProviderInitOrderSorter

Fixes: 206896767

Test: TP="FrameworksServicesTests" ; atest \
    ${TP}:com.android.server.pm.PackageManagerServiceTest
Change-Id: Ic7002ce72b20d7929bd1e3e0bb9f29367d2aea8a