[automerger skipped] Add test for startPptp am: bbb09d1e1b -s ours

am skip reason: Merged-In I0854fbeaf1a3e3554c157fde227a7bfa187b1013 with SHA-1 522cea7d4e is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/19252990

Change-Id: I8a34678c738aba6f561e1a2e2f7358cd49806bdb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>