[RESTRICT AUTOMERGE][pm] Move CtsContentTestCases to postsubmit for pm changes am: e8d24430

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24357433



Change-Id: I70706437ea8a6a4fa63ca5340d433f0e5cd78f7b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>