AOSP/QuickSearchBox - Update language to comply with Android's inclusive language guidance.

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

BUG=161896447

Test: make and make QuickSearchBoxTests

$ ls -l out/target/product/bonito/testcases/QuickSearchBoxTests/arm64/QuickSearchBoxTests.apk
-rw-r----- 1 rtenneti primarygroup 37271 Jul 29 16:56 out/target/product/bonito/testcases/QuickSearchBoxTests/arm64/QuickSearchBoxTests.apk

$ adb install -r -d -g out/target/product/bonito/testcases/QuickSearchBoxTests/arm64/QuickSearchBoxTests.apk
Performing Streamed Install
Success

$ adb shell am instrument -w  com.android.quicksearchbox.tests
...

com.android.quicksearchbox.LevenshteinFormatterTest:.........................
...

Change-Id: Ib606cba8d24a6cd3c8ac6e3cd77d25fecc96b1f4