passpoint-r2: change return type for getAllMatchingFqdnsForScanResults

It is to get the scanresults per home or roaming network type for
matching PasspointProfile.
With this, UI is able to connect to an AP based on the following priority.
1) Home network
2) Roaming network

Bug: 119514793
Test: ./frameworks/opt/net/wifi/tests/wifitests/runtests.sh
Change-Id: Ib0facd578c45d42a4137f019fc076c8e7410515e
Signed-off-by: Ecco Park <eccopark@google.com>
4 files changed