There are only three system wide fonts in Android;
1 normal (Droid Sans),
2 serif (Droid Serif),
3 monospace (Droid Sans Mono).
Applications can install fonts for themselves, but not for system-wide use.
For more you can see List of fonts included with each device link
and
Since the Ice Cream Sandwich release, Roboto has been the standard typeface on Android.
Since Froyo, Noto has been the standard typeface on Android for all languages not covered by Roboto. Noto is also the standard typeface for all languages on Chrome OS.
Refer here