Update language to comply with Android’s inclusive language guidance.

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

Test: atest --test-mapping apex/blobstore
Change-Id: If04f63361bab424abf5aa6e980067f689fd46622
Merged-In: If04f63361bab424abf5aa6e980067f689fd46622
2 files changed