handle null mScanResult for CTS test

This adds one more assert statement to ensure the ScanResult
variable is not null before we proceed.

Bug: 27744749
TEST=run cts test without error

Change-Id: I48f3c5369792d3a55b594b71250b0dfdf0d5282b
1 file changed
tree: 0d30f196f022747b1f3ad6a085fbd5c5682f4736
  1. tests/