Pipe input to integration test subprocess am: 586b031bd6 am: a1e9c503b6

Original change: https://android-review.googlesource.com/c/platform/tools/asuite/+/3310176

Change-Id: Ib73b09efc7686b72bdee851972cea4d6f9edd1d1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>