Update language to comply with Android’s inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

ListOfEditTexts is not referred anywhere, so good to remove it rather than
fixing words.

Bug: 161896447
Test: atest CharSequencesTest
Change-Id: I9dc07fa5f087e355d01fbc939749fac2f1f1f554