[automerger skipped] vibrator: vts: correct the checking flag when testing on() interfaces am: 9edfd34da9 -s ours

am skip reason: skipped by user jsusbilla

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1712328

Change-Id: I9dd8ef8ac98fcf4f2a6ce2a78a171873e8f4ebab