Merge "libfstab: Unexport InRecovery()" into main am: f6dc8ee31e

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2682015

Change-Id: Icf7aa381f4dfe669e6261e47219ce65f86b846e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>