WifiScanner: Add a flag to hide request from app-ops

This flag is intended to be used by the NLP/FLP package on the device to
hide their request from app-ops logging. NLP/FLP module will be
responsible to blame (note in app-ops) their external clients who
eventually get the location computed using these raw results.

Also, removed a redundant permission tag in the previously added
|ignoreLocationSettings| flag. This entire surface is useable by apps
holding LOCATION_HARDWARE permission. So, there is no need to explicitly
call this out for that field.

Bug: 119833663
Test: Compiles
Change-Id: Idba70fe4a15e611d4485d05b771d71f2d707d0b5