Fix warnings from the IDE

Julien LepillerWed Jun 10 23:54:17+0200 2020

36af59b

nani/app/furiganatextview/src
namelast commitdate
androidTest/Switch to AndroidXSat Apr 25 23:54:54+0200 2020
main/Add furiganaMon Apr 15 20:09:48+0200 2019
test/Add furiganaMon Apr 15 20:09:48+0200 2019