[cts] skip multi-user tests if not supported

Test: atest com.android.tests.packagesetting.host.PackageSettingTest
Test: atest android.content.pm.cts.PackageManagerShellCommandTest
BUG: 229587383
Change-Id: Ib56b59740256adc2fdfc6de945f3c2298dd11244
Merged-In: Ib56b59740256adc2fdfc6de945f3c2298dd11244
(cherry picked from commit 2b45ff0fb5acfe46cb33705cbbe297f81df21a7d)
2 files changed