Update SsidBlackListBootstraper.java

[verdulo]

I added to the filter-list non-existent Wi-Fi network "NVRAM WARNING..." with mac address 00:00:00:00:00:00.

[medape]

I also have a couple of SSIDs to add to the black-list, but I'd like to have a second opinion first:

• chromecast____.b, where ____ are 4 digits. I assume this is the default name for the Google Chromecast dongles, and while the TVs don't usually change location, it's very plausible to move a dongle between TVs, or households. My RadioBeacon database includes the SSIDs chromecast3057.b, chromecast4946.b and chromecast7384.b
• WIFI MONBUS, MONBUS-WIFI-____ and MONBUS-____, where ____ are, again, 4 digits. They match the wifis in Monbus buses, which travel between cities from Galicia (a region in Spain).