/system_ext can be a a symlink

With I5da96f78ddb11609c1271edfd1044d1979180b3c, ApexInfo.module_path now
returns the realpath of the APEX. However, the test GetFactoryPackages
wasn't amended to take that into account. Fixing the problem by
converting kApexPackageBuiltinDirs into realpaths before comparing
abainst the module_paths.

Bug: 180769447
Test: atest
ApexTestCases:ApexTestCases.ApexServiceTest#GetFactoryPackages -- --abi
x86_64

Change-Id: I3a0f1cadd833137189288a0089d5d35d4bfd624d
1 file changed