Merge "fs_mgr_remount.cpp: pedantic grammar fixes." into main am: 25ad0cae8a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3149396

Change-Id: I2c6232cca564e836ece6b9b5976c23d73f66e095
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>