Update unittest expectations for Android

We're using different user/group and file path on Android, so update
these expectations in unittest for Android.

While there, rename apmanager_unittest to apmanager_test, which seems
to be the convention for unittest target name on Android.

Bug: 24707201
TEST=Run unittest on dragonboard
TEST=Run unittest for Chrome OS

Change-Id: Ibd6880a713117578b68c814edc7e1cefe9170c75
5 files changed