dumpstate: only poll 30s for initial data am: ed65c767a6

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/19244252

Change-Id: Id89531ba9b95c490137b1faea326ea547eebd79a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>