Add check for vibrator before running test

If the device does not have a vibrator we can not
restore the vibrator settings and so we should
skip the test

Fixes: 148049781
Test: atest CtsBackupHostTestCases
AOSP Original: https://android-review.googlesource.com/c/platform/cts/+/1250510
Change-Id: I176efef7f6e985b60ea46cd98e6f43df4dfbe1d8
1 file changed