CTS Verifier: change LE Advertisement Tx Power test criteria

This changes the test criteria for the CTS Verifier:Bluetooth LE Scanner Test.
The new criteria allows the Bluetooth Controller to have equal or lower
Tx Power levels for the LE Advertisements (as per BTSIG spec).

Bug: 73287722
Test: Run CTS Verifier > NETWORKING > Bluetooth Test > Bluetooth LE Scanner Test
Change-Id: I293d78830788ad61a6a65ed70cf07fb6a39886f2
(cherry picked from commit fb433636374fc18c7632c240b7a21cabe94d277f)
1 file changed